Given the following cost and activity observations for Smithson Company's utilities, use the high-low method to calculate Smithson's fixed costs per month. Round your final answer to the nearest dollar. Do not round Interim calculations. on the following Cost Machine Hours 10,500 18,500 $26,000 38,500 28,400 30,800 11,500 15,300 January February March April Oa. $7,675 Ob. $16,310 Oc. $9.594 d. $30,701