Another mod request I think but I suspect that this would be quite trivial to code if something does not currently exist.
I'm setting up a site for a charity and they wish for users to have the ability to add a "donation" to the end of a purchase. Has anyone seen this done? Would it need to be added as a "product" or would you just add it to the order total? It's going to need to show on the invoice so I suspect that it will need to be added as a product somehow.
Any advice appreciated