Given the following costs and activities for Falcon Company's electrical costs, use the high-low method to compute Falcon's variable electrical costs per machine hour. Machine Hours Costs April $5,770 17.000 May 2.800 11.000 June 0,740 20,000 Oa. $1.52 per unit Ob. $0.03 per unit Oc$0.85 per unit Od. $0.66 per unit