Randall Sports has collected the following information over the last six months. Month Units produced Total costs March 10,000 $25,600 April 12,000 26,200 May 18,000 27,600 June 13,000 26,450 July 12,000 26,000 August 15,000 26,500 Using the high-low method, what is the variable cost per unit? A.) $2.00 b.) $0.25 c.) $2.56 d.) $0.22