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.

	Cost	Machine Hours
January	$64,740	10,100
February	109,560	18,400
March	76,390	12,200
April	93,020	15,300

a.$10,200

b.$32,600

c.$17,300

d.$8,200