At an activity level of 8,800 units, Pember Corporation's total variable cost is $146,520 and its total fixed cost is $219,296. Required: For the activity level of 8,900 units, compute: (a) the total variable cost; (b) the total fixed cost; (c) cost; (d) the average variable cost per unit: (e) the average fixed cost per unit; and (?) the average to per unit. Assume that this activity level is within the relevant range