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.

	Cost	Machine Hours
January	$26,200	9,500
February	35,900	17,500
March	28,400	12,300
April	30,400	15,100

a.$24,958

b.$14,681

c.$11,745

d.$46,979