GreenTech Manufacturing is preparing to make a $30,000 annual installment payment on a note payable. Of this amount, $2,000 will cover interest expense on the unpaid portion of the loan. If the principal balance on GreenTech's mortgage is currently $200,000, then the balance will drop to $198,000 after the payment is made $172,000 after the payment is made. $168.000 after the payment is made $170,000 after the payment is made