Need some help with these 4 financial accounting problems. Please explain the following calculations after completing the problems. 12-9a Show the supporting calculations used to arrive at the dollar amount entered for the net increase in cash. 12-10a Show supporting calculations for the dollar amounts entered online for the cash received from customers, payments to suppliers, and cash payments for operating expenses. 13-2a Show the supporting calculations for the ratios entered for parts (a) – (n).