10 Points Question 7 At the high level of activity in November, 7,000 machine hours were run and power costs were $18,000. In April, a month of low activity, 2,000 machine hours were run and power costs amounted to $9,000. Using the high-low method, the estimated fixed cost element of power costs is A $5,400 B. $12,600 $9,000 D) $18,000