diff --git a/attached_assets/image_1752086995593.png b/attached_assets/image_1752086995593.png
new file mode 100644
index 0000000..f3a06dc
Binary files /dev/null and b/attached_assets/image_1752086995593.png differ
diff --git a/client/src/components/NewSaleForm.tsx b/client/src/components/NewSaleForm.tsx
index 4c61248..0b81921 100644
--- a/client/src/components/NewSaleForm.tsx
+++ b/client/src/components/NewSaleForm.tsx
@@ -57,11 +57,13 @@ export default function NewSaleForm() {
   const availableCategories = typeArticle ? ARTICLE_CATEGORY_MAPPING[typeArticle as keyof typeof ARTICLE_CATEGORY_MAPPING] || [] : [];
 
   const createSaleMutation = useMutation({
-    mutationFn: (saleData: any) =>
-      apiRequest('/api/sales', {
+    mutationFn: async (saleData: any) => {
+      const response = await apiRequest('/api/sales', {
         method: 'POST',
         body: JSON.stringify(saleData),
-      }),
+      });
+      return response.json();
+    },
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ['/api/sales'] });
       toast({
diff --git a/client/src/components/SalesHistory.tsx b/client/src/components/SalesHistory.tsx
index a341d55..edbf60d 100644
--- a/client/src/components/SalesHistory.tsx
+++ b/client/src/components/SalesHistory.tsx
@@ -22,17 +22,20 @@ export default function SalesHistory({ canDelete = false }: SalesHistoryProps) {
   const [endDate, setEndDate] = useState('');
 
   // Query for sales
-  const { data: sales = [], isLoading } = useQuery<Sale[]>({
+  const { data: salesData, isLoading } = useQuery<Sale[]>({
     queryKey: ['/api/sales', startDate, endDate],
-    queryFn: () => {
+    queryFn: async () => {
       const params = new URLSearchParams();
       if (startDate) params.append('startDate', startDate);
       if (endDate) params.append('endDate', endDate);
       const queryString = params.toString();
-      return apiRequest(`/api/sales${queryString ? `?${queryString}` : ''}`);
+      const response = await apiRequest(`/api/sales${queryString ? `?${queryString}` : ''}`);
+      return response.json();
     },
   });
 
+  const sales = Array.isArray(salesData) ? salesData : [];
+
   // Delete mutation
   const deleteSaleMutation = useMutation({
     mutationFn: (saleId: number) =>