Elon has misplaced the sales contract for his car and cannot remember the amount he originally financed. He does know that the​ add-on interest rate was 4.5% and the loan required a total of 36 monthly payments of $314.51 each. How much did Elon​ borrow?

If Roberta's husband were to die, she and her children could live on $52,500 per year. Roberta earns $13,900 annually and estimates additional income of $3,500 from other sources. How much insurance should she purchase on her husband to cover the shortfall, assuming a 4.9% prevailing interest rate? Round to the nearest $1,000.

Mary and Kevin buy a vacation home for $350,000 down and take out a 15- year mortgage for the remainder. If their annual interest rate is 6%, how much will their monthly mortgage payment be?

Find the interest paid on a loan of ​$2,100 for three years at a simple interest rate of 12​% per year.