Macro to transfer data

Hello,

I am trying to create a worksheet for stock control. When I add the quantity and items needed, as well as the job reference, signed out by and authorised by, I want to be able to be able to click ADD or REMOVE. This needs to add the quantity of items to the costing sheet, and remove the items from the total stock sheet. The remove function needs to work in reverse.

Im pretty new to this type of thing, and would appreciate any assistance that anyone can offer.

Thanks