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. For the activity level of 8,900 units, compute the following values. (a) The total variable cost; (b) the total cost; (c) the average variable cost per unit; (d) the average fixed cost per unit; (e) the average total cost per unit. Assume that this activity level is within the relevant range.