Given the following cost and activity observations for Bounty Company's utilities, use the high-low method to determine Bounty's variable utilities cost per machine hour. Round your answer to the nearest cent.

	Cost	Machine Hours
March	$3,058	15,265
April	2,690	9,795
May	2,881	12,450
June	3,796	18,134

a.$0.13

b.$1.59

c.$0.93

d.$0.89