Desktop app for the following requirement app without any error and bugs having fast running login

Need Desktop app for the following requirement app without any error and bugs having fast running login ⦁ Admin Login Add item in database ⦁ item name ⦁ brand name ⦁ item price ⦁ item cost ⦁ alert quanity in stock ⦁ Add categories and also select category Stock Button show stock along with ⦁ item name ⦁ brand name ⦁ item price ⦁ item cost ⦁ alert quanity in stock Add categories and also select category also we can update and edit and delet Main Window ⦁ Customer name ⦁ Customer address ⦁ item name when we search item here it will fetch from database and we have to chose it ⦁ item quanity ⦁ when we put value in item quantity it will show the price , also Quanity in stock cost of the item and the price of item can be editable for this time only not in database ⦁ Add item to bill On Bill Item name item quantity and item price total price Item name item quantity and item price total price Item name item quantity and item price total price ... Grand total for example 600 paid amount 300 Remaining amount 300 next time the remain amount will be Previous amount on bill like this Previous amount is 300 current bill 250 Grand total 550 paid amount 250 Remaining amount 300 and this will upto so on also i can able to see the dues when click on the dues button on the main screen and if there is something messing so you can add by yourself