Aaron is planning to get a loan for a house costing $320,000. He plans to make a downpayment of 15% pf the cost of the house. The banks rate is 4.25% p.y.c.d. over 30 years. He expects to make regular month-end payments. Every 12 months, he will also make an extra payment when he gets his annual bonus payment. His first extra payment will be $2,000 and it will increase by 4% every year. What will his last 2 payments be?

please show in excel.