Time left 0:10:57 The following data pertains to activity and maintenance cost for two recent periods: Activity level (units) Maintenance cost 8,000 7,000 $ 31,500 $ 34,000 Maintenance cost is a mixed cost with both fixed and variable components. Using the high- low method, the cost formula for maintenance cost is: O Y = $4.25 x Y = $2,500 + 54.25 X Y = $14,000 + $2.50 X y = $4.50 X