Assume that you are the manager of Assembly, Inc. You have just received an order for 40 units of an industrial robot, which is to be delivered at the start of week 7 of your schedule.
Using the following information, determine how many units of subassembly G to order and the timing of those orders, given that subassembly G must be ordered in multiples of 80 units and all other components are ordered lot-for-lot. Assume that the components are used only for this particular robot.

Item Lead Time (weeks) On Hand Components
Robot 2 10 B, G, C(3)
B 1 5 E, F
C 1 20 G(2), H
E 2 4