Given the following cost and activity observations for George Company's utilities, use the high-low method to calculate George's variable utilities costs per machine hour. Cost $16,500 18,000 16,000 17,500 Machine Hours 105,000 120,000 100,000 117,000 | May June July August Oa. $1.00 Ob. $10.00 Oc. $100.00 Od. $0.10