not using a financial calculator formula by hand

(4 points) A couple is deciding between buying two different home entertainment systems. Option A costs $10,000 with a downpayment of $2000 and option B costs $15,000 with a downpayment of $3500. Either option will require them to make monthly payments (starting a month from now) at a rate of j2 = 4.32% for 6 years. What is the difference in monthly payments between the two? Odin is paying $750 rent at the beginning of each month for the next 20 years. (a) (3 points) Suppose instead he buys a house today. What is the cost of this house given it is equivalent to his 20 years of rent at j2 = 3%? (b) (2 points) What is the cash equivalent of his rent indefinitely at ja = 7%? . (6 points) A family amortizes a mortgage of $420,000 with monthly payments of j2 = 3.2% for 22 years. Determine the final payment made. A reminder that marks are only given for work shown. If done by EXCEL, no marks will be awarded