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 $3,137 15,232 April 2,648 9,742 11,820 17,913 May 2,850 June 3,807 a. 50.71 b. 50,67 Oc. so.14 d. 5170