O total fixed cost the level of activity O variable cost per unit Question 9 1 pts One full-time clerical worker is needed for every 750 accounts receivable. The total wages of the accounts receivable clerks is an example of a: O fixed cost step-variable cost. O mixed cost curvilinear cost. 1 pts Question 10 Which of the following is unlikely to be classified as a fixed cost with respect to the number of units produced and sold