The operating ratio is the sum of the cost of goods sold and the operating expenses divided by the net sales. Cell C12 contains the cost of goods sold of your company, cell D12 contains the operating expenses of your company, and cell E12 contains the net sales of your company. What formula would you place in cell F12 to calculate your company's net operating ratio?
A. =(C12:D12)/E12
B. =C12+D12/E12
C. =(C12+D12)/E12
D. =SUM(C12:E12)/E12