3) Sum-R-Fun sells a jet ski for 5,700 which includes tax. They offer an installment plan that requires 15% down. After that the customer would pay 150 per month for three years. A) How much is the down payment? B) What is the total of all the monthly payments? C) What is the total cost of the jet ski on the installment plan? D) What is the finance charge?

## Step 1: Calculate the down payment<br />### The down payment is 15% of the jet ski price. We calculate this by multiplying the price by the percentage expressed as a decimal: $5700 \times 0.15 = 855$.<br /><br />## Step 2: Calculate the total monthly payments<br />### The customer pays $150 per month for three years. Since there are 12 months in a year, the total number of payments is $3 \times 12 = 36$. The total amount paid over these 36 months is $36 \times \$150 = \$5400$.<br /><br />## Step 3: Calculate the total cost on the installment plan<br />### The total cost of the jet ski on the installment plan is the sum of the down payment and the total monthly payments: $\$855 + \$5400 = \$6255$.<br /><br />## Step 4: Calculate the finance charge<br />### The finance charge is the difference between the total cost on the installment plan and the original price of the jet ski: $\$6255 - \$5700 = \$555$.