Please explain all concepts and show math.

Operating Cash Flows (Direct Method) Calculate the cash flow in each of the following cases: a. Cash paid for rent Rent expense Prepaid rent January 1 Prepaid rent, December 31 $62,000 10,000 8,000 Cash Flow b. Cash received as interest: $16,000 5,000 3,700 Interest income Interest receivable, January 1 Interest receivable, December 31 Cash Flow c. Cash paid for merchandise purchasecd Cost of goods sold Inventory, January1 Inventory, December 31 Accounts payable, January 1 Accounts payable, December 31 $98,000 19,000 22,000 11,000 9,000 Cash Flow