Please help me solve this general accounting question using the right accounting principles.

Silver Star Technologies made purchases on account totalling $50,500 during the month of April. Additionally, during the month of April, Silver Star received $10,800 from a customer for future services and paid $42,500 of cash on its accounts payable balance. If the balance in the accounts payable account at the beginning of April was $82,000, what is the balance in the accounts payable at the end of April