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21. Electrical costs at one of Kantola Corporation's factories are listed below Machine-Hours Electrical Cost February March April May 3,570 3,580 3,553 3,627 3,625 3,565 3,548 3,542 3,593 $36 $36.4 $36 $36,833 $36 $36,366 $36,237 $36,213 $36,577 August Management believes that electrical cost is a mixed cost that depends on machine-hours. Use the high-low method to estimate the variable and fixed components of this cost. Compute the variable component first, rounding off to the nearest whole cent. Then compute the fixed component, rounding off to the nearest whole dollar. Those estimates are closest to A. $0.14 per machine-hour, $36,336 per month B. $10.19 per machine-hour; $36,470 per month C. $7.48 per machine-hour; $9,708 per month D. $7.29 per machine-hour $10,392 per month