Canyon Tours showed the following components of working capitol last year Accounts receivable Inventory Accounts payable Beginning of YE 527.000 13.500 16.000 End of Year $ 24,500 15.500 19,500 a. What was the change in net working capital during the year? (A negative amount should be indicated by a minus sign.) Change in not working capital b. If sales were $37.500 and costs were $25,500, what was cash flow for the year? ignore taxes. Cash flow