X Company accumulates the following data about maintenance costs, a mixed cost, using hours as the activity level: January February March April May June hours 5,000 3,000 7,000 10,000 12.000 6,000 Maintenance Cost 90,000 61,000 135,000 183,000 223,000 111,000 Based on the above, in applying the high-low method, what is the unit variable cost? * $18 $ O $19 O $17 O None of the above Based on the above, using the high-low method, the estimated fixed cost element is: O $5,000 $6,000 $7,000 None of the above Based on the above, using the high-low method, determine an estimate of total maintenance cost for a month in which 13,000 hours are expected to be used. * $227,000 $241,000 $252,000 None of the