Add a new cost for each item? How about a selectable cost?

[ajames]

OK, I have a client selling flowers with an additional $10 donation attached. The donation is non-taxable, so I would like to have it as a new calculated cost (ex.: now TOTAL PRICE + TAX + SHIPPING = TOTAL, I want TOTAL PRICE + TAX + DONATION + SHIPPING).

Since the donation is not taxable, I need it seperated from the price. I would like it to appear in the Manage Cart table so customers know the breakdown. Is there any easy way to add a cost category?

Once I can do that, I can envision my client adding an option to make the donation variable ($10, $20, $50, choose one). Can you see any problems with that?

Thanks in advance