diff --git a/app/Http/Requests/Admin/Master/Product/ProductVariantRequest.php b/app/Http/Requests/Admin/Master/Product/ProductVariantRequest.php
index 6a068e4..30ffe60 100644
--- a/app/Http/Requests/Admin/Master/Product/ProductVariantRequest.php
+++ b/app/Http/Requests/Admin/Master/Product/ProductVariantRequest.php
@@ -31,7 +31,7 @@ public function rules(): array
             'retail_stock' => ['required', 'integer', 'min:0'],
             'photo_keys' => ['required', 'array', 'min:1', 'max:5'],
             'photo_keys.*' => ['required', 'string', 'max:500'],
-            'prices' => ['required', 'array', 'size:9'],
+            'prices' => ['required', 'array'],
             'prices.*.type' => ['required', Rule::in(PriceType::values())],
             'prices.*.price' => ['required', 'integer', 'min:0'],
         ];
diff --git a/app/Services/Admin/Manage/TransactionService.php b/app/Services/Admin/Manage/TransactionService.php
index e518dec..afef58b 100644
--- a/app/Services/Admin/Manage/TransactionService.php
+++ b/app/Services/Admin/Manage/TransactionService.php
@@ -19,6 +19,7 @@
 use App\Services\S3PresignedService;
 use Illuminate\Contracts\Pagination\LengthAwarePaginator;
 use Illuminate\Support\Facades\DB;
+use Illuminate\Validation\ValidationException;
 
 class TransactionService
 {
@@ -165,6 +166,12 @@ public function store(array $data): Order
             $negoPrice = ! empty($data['nego_price']) ? (int) $data['nego_price'] : null;
             $totalAmount = $subtotal - $discount - ($negoPrice ?? 0);
 
+            if ($totalAmount <= 0) {
+                throw ValidationException::withMessages([
+                    'discount' => 'Total harga tidak boleh nol atau kurang.',
+                ]);
+            }
+
             $order = Order::create([
                 'created_by_id' => auth()->id(),
                 'customer_id' => $data['customer_id'] ?? null,
@@ -232,6 +239,12 @@ public function update(Order $order, array $data): Order
             $negoPrice = ! empty($data['nego_price']) ? (int) $data['nego_price'] : null;
             $totalAmount = $subtotal - $discount - ($negoPrice ?? 0);
 
+            if ($totalAmount <= 0) {
+                throw ValidationException::withMessages([
+                    'discount' => 'Total harga tidak boleh nol atau kurang.',
+                ]);
+            }
+
             foreach ($itemRows as &$row) {
                 $row['order_id'] = $order->id;
             }
@@ -303,9 +316,13 @@ private function buildItemRows(array $items, string $stockType, string $priceTyp
         $variantIds = collect($items)->pluck('product_variant_id')->unique()->all();
         $variants = ProductVariant::query()
             ->whereKey($variantIds)
-            ->with('productPrices:id,variant_id,type,price')
+            ->with(['productPrices:id,variant_id,type,price', 'product:id,name'])
             ->get();
 
+        $variantLabels = $variants->mapWithKeys(fn (ProductVariant $v) => [
+            $v->id => $v->product->name.' - '.$v->name,
+        ]);
+
         $prices = $variants->mapWithKeys(function (ProductVariant $variant) use ($resolvedPriceType) {
             $price = $variant->productPrices
                 ->first(fn ($p) => $p->type === $resolvedPriceType);
@@ -320,13 +337,28 @@ private function buildItemRows(array $items, string $stockType, string $priceTyp
             return [$variant->id => $price?->price ?? 0];
         });
 
-        return collect($items)->map(function ($item) use ($now, $prices, $capitalPrices, $stockType, &$subtotal, &$totalCost) {
+        return collect($items)->map(function ($item) use ($now, $prices, $capitalPrices, $variantLabels, $stockType, &$subtotal, &$totalCost) {
             $quantity = (int) $item['quantity'];
             $unitPrice = (int) ($prices[$item['product_variant_id']] ?? 0);
+            $label = $variantLabels[$item['product_variant_id']] ?? ' Produk';
+
+            if ($unitPrice <= 0) {
+                throw ValidationException::withMessages([
+                    'items' => 'Harga untuk "'.$label.'" belum diatur.',
+                ]);
+            }
+
             $itemSubtotal = $unitPrice * $quantity;
             $subtotal += $itemSubtotal;
 
             $capitalPrice = (int) ($capitalPrices[$item['product_variant_id']] ?? 0);
+
+            if ($capitalPrice <= 0) {
+                throw ValidationException::withMessages([
+                    'items' => 'Harga modal untuk "'.$label.'" belum diatur.',
+                ]);
+            }
+
             $totalCost += $capitalPrice * $quantity;
 
             return [
diff --git a/app/Services/Admin/Master/Product/ProductService.php b/app/Services/Admin/Master/Product/ProductService.php
index a1693f1..c00ecdb 100644
--- a/app/Services/Admin/Master/Product/ProductService.php
+++ b/app/Services/Admin/Master/Product/ProductService.php
@@ -40,10 +40,10 @@ public function paginated(int $perPage = 25, string $search = '', string $sort =
                 'productVariants:id,product_id,name,stock,reject_stock,retail_stock',
                 'productVariants.productPrices:id,variant_id,type,price',
             ])
-            ->when($search, fn($q) => $q->where('name', 'like', "%{$search}%"))
-            ->when($filters['name'] ?? null, fn($q, $name) => $q->where('name', 'like', "%{$name}%"))
-            ->when($filters['status'] ?? null, fn($q, $status) => $q->where('status', $status))
-            ->when($filters['category'] ?? null, fn($q, $categoryId) => $q->whereHas('categories', function ($cq) use ($categoryId) {
+            ->when($search, fn ($q) => $q->where('name', 'like', "%{$search}%"))
+            ->when($filters['name'] ?? null, fn ($q, $name) => $q->where('name', 'like', "%{$name}%"))
+            ->when($filters['status'] ?? null, fn ($q, $status) => $q->where('status', $status))
+            ->when($filters['category'] ?? null, fn ($q, $categoryId) => $q->whereHas('categories', function ($cq) use ($categoryId) {
                 $cq->where('categories.id', $categoryId);
             }))
             ->when(($filters['stock'] ?? null) === 'empty', function ($q) {
@@ -58,7 +58,7 @@ public function paginated(int $perPage = 25, string $search = '', string $sort =
         $paginator->getCollection()->each(function ($product) {
             $product->productVariants->each(function ($variant) {
                 $media = $variant->getMedia('images');
-                $variant->photo_urls = $media->map(fn($m) => $this->s3Service->getTemporaryUrl($m->getPath()))->toArray();
+                $variant->photo_urls = $media->map(fn ($m) => $this->s3Service->getTemporaryUrl($m->getPath()))->toArray();
             });
         });
 
@@ -84,7 +84,7 @@ public function store(array $data): Product
 
             // Bulk insert variants
             $now = now();
-            $variantRows = collect($data['variants'])->map(fn($v) => [
+            $variantRows = collect($data['variants'])->map(fn ($v) => [
                 'product_id' => $product->id,
                 'name' => $v['name'],
                 'stock' => $v['stock'],
@@ -98,7 +98,7 @@ public function store(array $data): Product
 
             // Map variant name -> variant ID
             $insertedVariants = ProductVariant::where('product_id', $product->id)->get();
-            $variantMap = $insertedVariants->mapWithKeys(fn($v) => [$v->name => $v->id]);
+            $variantMap = $insertedVariants->mapWithKeys(fn ($v) => [$v->name => $v->id]);
 
             // Bulk insert prices
             $priceRows = [];
@@ -144,7 +144,7 @@ public function store(array $data): Product
         NotificationService::notify(
             roles: [Role::OWNER, Role::DEVELOPER, Role::DIREKTUR, Role::ADMIN_TOKO],
             title: 'Produk Baru',
-            body: "Produk \"{$product->name}\" berhasil ditambahkan" . ' oleh ' . auth()->user()->full_name . '.',
+            body: "Produk \"{$product->name}\" berhasil ditambahkan".' oleh '.auth()->user()->full_name.'.',
             url: route('admin.master.products.index'),
         );
 
@@ -161,8 +161,8 @@ public function getForEdit(Product $product): array
 
         $variants = $product->productVariants->map(function (ProductVariant $variant) {
             $media = $variant->getMedia('images');
-            $photoKeys = $media->map(fn($m) => $m->getCustomProperty('s3_key') ?? $m->file_name)->toArray();
-            $photoUrls = $media->map(fn($m) => $this->s3Service->getTemporaryUrl($m->getPath()))->toArray();
+            $photoKeys = $media->map(fn ($m) => $m->getCustomProperty('s3_key') ?? $m->file_name)->toArray();
+            $photoUrls = $media->map(fn ($m) => $this->s3Service->getTemporaryUrl($m->getPath()))->toArray();
 
             return [
                 'id' => $variant->id,
@@ -172,7 +172,7 @@ public function getForEdit(Product $product): array
                 'retail_stock' => $variant->retail_stock,
                 'photo_keys' => $photoKeys,
                 'photo_urls' => $photoUrls,
-                'prices' => $variant->productPrices->map(fn($p) => [
+                'prices' => $variant->productPrices->map(fn ($p) => [
                     'type' => $p->type->value,
                     'price' => $p->price,
                 ]),
@@ -230,7 +230,7 @@ public function update(Product $product, array $data): Product
             $existingVariantsMap = ProductVariant::whereIn('id', $existingVariantIds)
                 ->with('media')
                 ->get()
-                ->mapWithKeys(fn($v) => [$v->id => $v]);
+                ->mapWithKeys(fn ($v) => [$v->id => $v]);
 
             // Collect old stock data + identify changed variants
             $oldStockDataMap = [];
@@ -256,7 +256,7 @@ public function update(Product $product, array $data): Product
             // Bulk update changed variants (only changed ones, not all)
             if ($changedIds !== []) {
                 $changedUpdates = collect($data['variants'])
-                    ->filter(fn($v) => isset($v['id']) && in_array($v['id'], $changedIds));
+                    ->filter(fn ($v) => isset($v['id']) && in_array($v['id'], $changedIds));
 
                 foreach ($changedUpdates as $variantData) {
                     $existingVariantsMap[$variantData['id']]->update([
@@ -269,11 +269,11 @@ public function update(Product $product, array $data): Product
             }
 
             // Bulk create new variants
-            $newVariantsData = collect($data['variants'])->filter(fn($v) => ! isset($v['id']));
+            $newVariantsData = collect($data['variants'])->filter(fn ($v) => ! isset($v['id']));
             $newVariantIdMap = [];
 
             if ($newVariantsData->isNotEmpty()) {
-                $newVariantRows = $newVariantsData->map(fn($v) => [
+                $newVariantRows = $newVariantsData->map(fn ($v) => [
                     'product_id' => $product->id,
                     'name' => $v['name'],
                     'stock' => $v['stock'],
@@ -290,7 +290,7 @@ public function update(Product $product, array $data): Product
                     ->whereIn('name', $newVariantsData->pluck('name')->toArray())
                     ->get();
 
-                $newVariantIdMap = $newlyCreated->mapWithKeys(fn($v) => [$v->name => $v->id])->toArray();
+                $newVariantIdMap = $newlyCreated->mapWithKeys(fn ($v) => [$v->name => $v->id])->toArray();
             }
 
             // Build variant_id lookup: existing by id, new by name
@@ -354,7 +354,7 @@ public function update(Product $product, array $data): Product
                     }
                 }
 
-                $changedModels = collect($changedIds)->map(fn($id) => $existingVariantsMap[$id])->filter();
+                $changedModels = collect($changedIds)->map(fn ($id) => $existingVariantsMap[$id])->filter();
                 $this->stockMutationService->recordBulkAdjustment(
                     $changedModels,
                     $oldStockDataMap,
@@ -388,7 +388,7 @@ public function update(Product $product, array $data): Product
         NotificationService::notify(
             roles: [Role::OWNER, Role::DEVELOPER, Role::DIREKTUR, Role::ADMIN_TOKO],
             title: 'Produk Diperbarui',
-            body: "Produk \"{$product->name}\" berhasil diperbarui" . ' oleh ' . auth()->user()->full_name . '.',
+            body: "Produk \"{$product->name}\" berhasil diperbarui".' oleh '.auth()->user()->full_name.'.',
             url: route('admin.master.products.index'),
         );
 
@@ -414,7 +414,7 @@ public function destroy(Product $product): bool
         NotificationService::notify(
             roles: [Role::OWNER, Role::DEVELOPER, Role::DIREKTUR, Role::ADMIN_TOKO],
             title: 'Produk Dihapus',
-            body: "Produk \"{$product->name}\" berhasil dihapus" . ' oleh ' . auth()->user()->full_name . '.',
+            body: "Produk \"{$product->name}\" berhasil dihapus".' oleh '.auth()->user()->full_name.'.',
             url: route('admin.master.products.index'),
         );
 
@@ -439,7 +439,7 @@ public function approve(Product $product): void
         NotificationService::notify(
             roles: [Role::OWNER, Role::DEVELOPER],
             title: 'Produk Disetujui',
-            body: "Produk \"{$product->name}\" telah disetujui oleh " . auth()->user()->full_name . '.',
+            body: "Produk \"{$product->name}\" telah disetujui oleh ".auth()->user()->full_name.'.',
             url: route('admin.master.products.index'),
             additionalUser: $product->createdBy ?? null,
         );
@@ -455,7 +455,7 @@ public function reject(Product $product, string $reason = ''): void
         NotificationService::notify(
             roles: [Role::OWNER, Role::DEVELOPER],
             title: 'Produk Ditolak',
-            body: "Produk \"{$product->name}\" telah ditolak oleh " . auth()->user()->full_name . '.',
+            body: "Produk \"{$product->name}\" telah ditolak oleh ".auth()->user()->full_name.'.',
             url: route('admin.master.products.index'),
             additionalUser: $product->createdBy ?? null,
         );
@@ -471,7 +471,7 @@ public function resubmit(Product $product): void
         NotificationService::notify(
             roles: [Role::OWNER, Role::DEVELOPER],
             title: 'Produk Diajukan Ulang',
-            body: "Produk \"{$product->name}\" telah diajukan ulang oleh " . auth()->user()->full_name . '.',
+            body: "Produk \"{$product->name}\" telah diajukan ulang oleh ".auth()->user()->full_name.'.',
             url: route('admin.master.products.index'),
         );
     }
diff --git a/app/Services/Admin/Master/Product/ProductVariantService.php b/app/Services/Admin/Master/Product/ProductVariantService.php
index 8751011..dafe278 100644
--- a/app/Services/Admin/Master/Product/ProductVariantService.php
+++ b/app/Services/Admin/Master/Product/ProductVariantService.php
@@ -50,7 +50,7 @@ public function getForRestock(): array
                         ->first(fn ($price) => $price->type === PriceType::REJECT);
                     $variant->reject_price = $rejectPrice?->price ?? 0;
                 });
-            });
+            })->toArray();
     }
 
     public function getForTransaction(): array
@@ -74,7 +74,7 @@ public function getForTransaction(): array
                     $prices = $variant->productPrices->mapWithKeys(fn ($p) => [$p->type->value => $p->price]);
                     $variant->prices = $prices;
                 });
-            });
+            })->toArray();
     }
 
     public function getForEdit(ProductVariant $variant): array
diff --git a/resources/js/pages/admin/manage/transaction/create.tsx b/resources/js/pages/admin/manage/transaction/create.tsx
index beb4c1c..3785054 100644
--- a/resources/js/pages/admin/manage/transaction/create.tsx
+++ b/resources/js/pages/admin/manage/transaction/create.tsx
@@ -236,12 +236,16 @@ export default function TransactionCreate({
 
     const incrementQuantity = useCallback(
         (variantId: number, amount: number) => {
+            if (amount > 0 && getUnitPrice(variantId) <= 0) {
+                toast.error('Harga produk ini belum diatur.');
+                return;
+            }
             setQuantities((prev) => ({
                 ...prev,
                 [variantId]: Math.max(0, (prev[variantId] ?? 0) + amount),
             }));
         },
-        [],
+        [getUnitPrice],
     );
 
     const cartItems: CartLine[] = (() => {
@@ -437,10 +441,14 @@ export default function TransactionCreate({
                                                                             )}{' '}
                                                                             pcs
                                                                             ·{' '}
-                                                                            {formatCurrency(
-                                                                                stockType === 'reject'
-                                                                                    ? (variant.prices?.reject ?? 0)
-                                                                                    : (variant.prices?.[priceType] ?? 0),
+                                                                            {getUnitPrice(variant.id) <= 0 ? (
+                                                                                <span className="text-destructive">Harga belum diatur</span>
+                                                                            ) : (
+                                                                                formatCurrency(
+                                                                                    stockType === 'reject'
+                                                                                        ? (variant.prices?.reject ?? 0)
+                                                                                        : (variant.prices?.[priceType] ?? 0),
+                                                                                )
                                                                             )}
                                                                         </p>
                                                                     </div>
@@ -490,6 +498,7 @@ export default function TransactionCreate({
                                                                         type="button"
                                                                         variant="outline"
                                                                         size="icon"
+                                                                        disabled={getUnitPrice(variant.id) <= 0}
                                                                         onClick={() =>
                                                                             incrementQuantity(
                                                                                 variant.id,
@@ -882,7 +891,11 @@ export default function TransactionCreate({
                                                 !selectedProductId ||
                                                 Object.values(quantities).every(
                                                     (q) => q <= 0,
-                                                )
+                                                ) ||
+                                                Object.entries(quantities).some(
+                                                    ([id, q]) => q > 0 && getUnitPrice(Number(id)) <= 0,
+                                                ) ||
+                                                total <= 0
                                             }
                                         >
                                             {processing
diff --git a/resources/js/pages/admin/manage/transaction/edit.tsx b/resources/js/pages/admin/manage/transaction/edit.tsx
index 74e7aeb..6f58eec 100644
--- a/resources/js/pages/admin/manage/transaction/edit.tsx
+++ b/resources/js/pages/admin/manage/transaction/edit.tsx
@@ -206,12 +206,16 @@ export default function TransactionEdit({
 
     const incrementQuantity = useCallback(
         (variantId: number, amount: number) => {
+            if (amount > 0 && getUnitPrice(variantId) <= 0) {
+                toast.error('Harga produk ini belum diatur.');
+                return;
+            }
             setQuantities((prev) => ({
                 ...prev,
                 [variantId]: Math.max(0, (prev[variantId] ?? 0) + amount),
             }));
         },
-        [],
+        [getUnitPrice],
     );
 
     const cartItems: CartLine[] = (() => {
@@ -416,10 +420,14 @@ export default function TransactionEdit({
                                                                             )}{' '}
                                                                             pcs
                                                                             ·{' '}
-                                                                            {formatCurrency(
-                                                                                stockType === 'reject'
-                                                                                    ? (variant.prices?.reject ?? 0)
-                                                                                    : (variant.prices?.[priceType] ?? 0),
+                                                                            {getUnitPrice(variant.id) <= 0 ? (
+                                                                                <span className="text-destructive">Harga belum diatur</span>
+                                                                            ) : (
+                                                                                formatCurrency(
+                                                                                    stockType === 'reject'
+                                                                                        ? (variant.prices?.reject ?? 0)
+                                                                                        : (variant.prices?.[priceType] ?? 0),
+                                                                                )
                                                                             )}
                                                                         </p>
                                                                     </div>
@@ -469,6 +477,7 @@ export default function TransactionEdit({
                                                                         type="button"
                                                                         variant="outline"
                                                                         size="icon"
+                                                                        disabled={getUnitPrice(variant.id) <= 0}
                                                                         onClick={() =>
                                                                             incrementQuantity(
                                                                                 variant.id,
@@ -860,7 +869,11 @@ export default function TransactionEdit({
                                                 uploading ||
                                                 Object.values(quantities).every(
                                                     (q) => q <= 0,
-                                                )
+                                                ) ||
+                                                Object.entries(quantities).some(
+                                                    ([id, q]) => q > 0 && getUnitPrice(Number(id)) <= 0,
+                                                ) ||
+                                                total <= 0
                                             }
                                         >
                                             {processing