13 . The Fairmont Machine Shop wants to develop a cost estimating equation for its monthly cost o electricity . It has the following data Month Cost of Electricity ( * ) Direct Labor - Hours ( X ) January $14 000 1.500 April $15000 1 09 July $17 000 2000 October $14 , 500 1600 What would be the best equation using the high- low method ? A ) Y = $4 , 000 + 578 B ) Y = 50 + 59X C ) Y = $1 000 + $8X D ) Y = $5 ,000 + $6* * E ) None of the above