The Longreach Toy Factory has determined machine hours to be the cost driver of the company's electricity costs. During the first six months of the year, the company incurred the following electricity costs: Month Machine Hours Electricity Cost Jan 780 $8,200 Feb 720 $8,360 Mar 800 $8,950 Apr 900 $9,360 May 950 $9,625 Jun 920 $9,150 Using the high-low method, determine the cost formula that expresses the cost behaviour of the company's Electricity Costs. O A. Y= $1,664 + $8.38X O B. Y= $4,400 + $5.50X O C. Y= $4,760 + $5.50X O D. Y= $3,735 + $6.20X