On invoices that I apply a lot total discount, I would like to show 2 subtotal fields.
Subtotal, exclusive of discount, exclusive of taxes, and in the event a discount applies, a 2nd subtotal which is inclusive of the discount and exclusive of taxes.

The reason I'm requesting this, is that when I process payment with credit card for the invoice, my credit card app automatically calculated the total invoice amount inclusive of taxes - and I need to enter the subtotal (exclusive of taxes, inclusive of dicounts, inclusive of freight if applicable) into the credit card application - in order to do this I have to manually subtract the taxes from the invoice total to come up with the subtotal, inclusive of discount. Since I typically give discounts on the lot value instead of item by item, also need to show the subtotal exclusive of taxes, freight and discounts.

Thank you. This is an easy improvement to implement, please make it.