During the month of March, Cooley Computer Services made purchases on account totaling $43,500. Also during the month of March, Cooley was paid $8,000 by a customer for services to be provided in the future and paid $36,900 of cash on its accounts payable balance. If the balance in the accounts payable account at the beginning of March was $77,300, what is the balance in accounts payable at the end of March?