apters 3-5 Instructions I help Question 9 (of 25) Save & Exit Submit Time remaining: 110:05 Holly average cost per unit of $7.30 at its highest level of activity when seles equaled 24,000 units. Holly would estimate fixed costs as: Co. uses the high-low method. It had an average cost per unit of S12 at its lowest level of activity when sales equaled 12,000 units and an O $19.3 O$112.800 O $144,000 O $9.65 720PM