How to create payment term to reflect multi-discounts?

Need assistance to create the following term in R.12.2.5

Term - A 2% discount is allowed if invoices dated the 1st to the 15th are paid on or before the 25th of the month and invoices dated the 16th to the end of the month are paid by the 10th of the following month.  Otherwise the entire invoice is due on or before 30 days after the invoice date.