I have a non profit account for a historical society.
I have already inserted an Add to Cart button. This button takes you to a webpage with a shopping cart. The shopping cart is for historical society membership with a drop down to choose different levels of membership. This is good.
The problem is that I also need to add an additional button or empty box on this page that is part of the shopping cart.
In addition to the drop down for membership I need a button for the user to donate an amount of their choice. Not an option to choose an amount but to enter an amount just like the donate button does.
I would like the membership chosen and the donation to add up to one total in the checkout for payment.