QUESTION 13 Bell Corporation reports that at an activity level of 8,700 units, its total variable cost is $653,109, and its total fixed cost is $658,416. Required: For the activity level of 8.800 units, assume this level is within the relevant range. Compute a. the total variable cost b. the total fixed cost c. the total cost d. the average variable cost per unit. e. the average fixed cost per unit, and f. the average total cost per unit