Solve using Excel and show your work:

You want to buy a house worth $150,000. The bank is willing to give you a 15-year loan at 3% per year with monthly compounding. However, the bank thinks that you can only pay $800 per month in installments. Your mother has offered to give you the difference amount as a gift to be used towards the down payment of the house. How much does she need to give you? Ignore the processing fee.