This idea also relates to requests to allow a dollar amount installment in the payment plan. Something like:

Installment 1: $500

Installment 2: 70%

Installment 3: 30%

Where installments by percentage would take the total, subtract any dollar amount installments, then divide the rest.

However, it would be nice to also have the option where, if installment N is a dollar amount, the percentage installments would divide the total, and then the N+1 installments would subtract the dollar amounts of N from their amounts owed. (Overages would have to carry forward to N+2.)

This idea also relates to requests to allow a dollar amount installment in the payment plan. Something like:

Installment 1: $500

Installment 2: 70%

Installment 3: 30%

Where installments by percentage would take the total, subtract any dollar amount installments, then divide the rest.

However, it would be nice to also have the option where, if installment N is a dollar amount, the percentage installments would divide the total, and then the N+1 installments would subtract the dollar amounts of N from their amounts owed. (Overages would have to carry forward to N+2.)