3. If production volume increases from 8000 to 10 000 units, a. total costs will increase by 20 per cent. b. total costs will increase by 25 per cent. c. total variable costs will increase by 25 per cent. d. mixed and variable costs will increase by 25 per cent. 4. The direct material cost is 10 000 when 2000 units are produced. What is the direct material cost for 2500 units produced? a. 10 000 b. 8000 c. 15 000 d. 12 500 5. Fixed cost per unit is 9 when 20 000 units are produced and its 6 when 30 000 units are produced. What is the total fixed cost when nothing is produced? a. 120 000 b. 270 000 c. 15 d. 180 000 6. Harry has just received his bachelor's degree and is considering two alternatives. (1) He could obtain an entry-level accounting position paying 30 000 per year. (2) He could obtain his master's degree with one more year of study and work part-time for 8 000 per year. The opportunity cost associated with Harry obtaining his master's degree is a. 0. b. 22 000. c. 30 000. d. 38 000