39. Consider the following product structure. E ll D(2) Ell) F(2) DU) F(1) If the demand for product A is 30 units, and there are 10 units of B on hand and none of C, how many units of part D will be needed? A) 90 B) 70 C) 110 D) 40 E) 3 40. It is week 1 and there are currently 20 As in stock. We need 300 As at the start of week 5. If there are scheduled receipts planned for week 3 and week 4 of 120 As each and A has a lead time of 1 week, when and how large of an order should be placed to meet the requirement of 300 As? A) Week 5, 40 As B) Week 4, 300 As C) Week 1, 300 As D) Week 1, 40 As E) Week 4, 40 As 205 H 0* = A) Lead time is known and constant. B) Production and use can occur simultaneously. C) The only variable costs are setup cost and holding (or carrying) cost. D) Demand is known, constant, and independent. E) Quantity discounts are not possible