Martin purchased a wide screen television for $1,520. He made a down payment of 10% and paid the balance over 10 months. The finance charge was 5% of the amount financed. Find the down payment, the installment price of the television, and the monthly payment?

To find the down payment you take the total cost times the down payment percent, $1,520 * 0.10 = $152

I cannot find the total installment price of the television? or the monthly payment

I know that total installment price = sum of all payments plus down payment, but I have no clue on how to get the sum of all payments?