My work involves taking customers pet photos and making them into a digital artwork, with my main product being wall art.
There is an initial design fee for the digital work only. Is there an app where it allows the customer to add this fee once, so if they want to purchase multiple items such as canvas, mugs, and blanket they are not getting charged multiple times for the initial design work?
If your customer's are registered, it would be possible to set this tag if they have already been charged for the artwork. Possible through code customization.