Online Store Website/App problem

[KrishTheWiz7]

Hi, community,

My goal is to create an Online Store Website/App.

But I have a major problem. My problem is that the code cannot let the user buy multiple items at a time, instead, the user goes back into the program multiple times to get the amount of items they desire. Then if they don't want multiple of the same item, they go into the program multiple times to get rid of their items.

I want the user to add and remove multiple items at a time but it is not working. Please guide me, your help is appreciated.

[KrishTheWiz7]

If you can that would be great!