4. For each of the following separate cases, use the information provided to calculate the missing cash inflow or cash outflow: (a) Account receivable balance: Beginning of year . $ 60,000 End of years .. 57,000 Sales received from (all on credit). 375,000 Cash Received from Customer..$________ (b) Accounts payable balances: Beginning of year . $ 42,000 End of year 45,000 Merchandise inventory balances: Beginning of year $ 50,000 End of year 47,500 Cost of Goods sold 250,000 Cash paid of Merchandise Inventory $_________ (c) Interest Payable Balances: Beginning of year $ 7,500 End of year .. 9,200 Interest Expense .. 35,000 Cash paid for Interest $_________