3) Wages paid to machine operators on an assembly line are an example of which type of cost? A) direct manufacturing labour costs B) direct manufacturing overhead costs C) direct materials costs D) indirect manufacturing overhead costs E) indirect material costs 4) Which of the following is TRUE concerning prime costs? A) Prime costs are direct manufacturing costs. B) They include indirect manufacturing labour C) They equal the sum of direct manufacturing costs plus conversion costs. D) They equal the sum of fixed manufacturing costs plus conversion costs. E) They are indirect manufacturing costs. 5) Manufacturing overhead includes A) corporate insurance cost. B) the executive officers' salaries. C) marketing costs. D) supplies used in the human resources department. E) plant utilities. 6) Which of the following is a fixed cost in a clothing store? A) store manager's salary B) electricity C) sales commissions D) inventory E) paper for the cash register