At the beginning of the week, cash-in-bank has an account balance of $3,500. During the week, the following transactions occur: office supplies in the amount of $236.12 are purchased ; the owner takes a withdrawal of $450; a customer's payment of $780 is received; and the company's monthly electric bill in the amount of $178.43 is paid. What is the balance of the cash-in-bank account at the end of the week?