HOW MUCH WILL A NEW CAR COST? THE AVERAGE COST OF A NEW CAR IN 1990 WAS $14371. IN 2003 THE AVERAGE COST HAD RISEN TO $22360. WHAT IS THE AMOUNT OF THE MONTHLY PAYMENT? THE AMOUNT OF THE MONTHLY PAYMENT IS A FUNCTION OF THE COST OF THE CAR, THE SIZE OF YOUR DOWN PAYMENT, THE FINANCE RATE AND THE PERRIOD OF THE LOAN. THE FORMULA USED TO COMPUTE THE MONTHLY PAYMENT IS?