C-Drive Components has collected the following production data for the past four months: Units produced Total cost 7,000 $ 16,500 10,000 22,500 8,500 17,750 9,000 21,000 If the high-low method is used, what is the monthly total cost equation? Total cost = $2,500 + ($2.00 x units produced) Total cost = $3,750 + ($2.75 x units produced) Total cost = $1,500 + ($2.00 x units produced) Total cost = $500 + ($2.25 x units produced)