Electrical costs at one of Rome Corporation's factories are listed below: Machine-Hours Electrical CostMarch458  $1,007April423  $934May440  $979June409  $902July426  $952August372  $822September414  $926October431  $949November468  $1,025 Management believes that electrical cost is a mixed cost that depends on machine-hours.Using the high-low method, the estimate of the variable component of electrical cost per machine-hour is closest to:

A. $2.21
B. $2.11
C. $1.80
D. $0.47


Answer: B

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