I posted this and the expert answer was wrong. Please let me know what the blanks are.

b) Determine the gross quantities needed of each item if you are to assemble 150 brackets. Click the icon to view the completed product structure. Base: 150 units (enter your response as a whole number). Spring: 300 units (enter your response as a whole number). Clamp: 750 units (enter your response as a whole number). Housing: 300 units (enter your response as a whole number). Handle: 750 units (enter your response as a whole number). Casting: 1500 units (enter your response as a whole number). Bearing: 300 units (enter your response as a whole number). Shaft: 600 units (enter your response as a whole number). c) Compute the net quantities needed if there are 30 of the base and 100 of the clamp in stock. Base: 20 units (enter your response as a whole number). Spring: 100 units (enter your response as a whole number). Clamp: 200 units (enter your response as a whole number). Housing: 100 units (enter your response as a whole number). Handle: 300 units (enter your response as a whole number). Casting: 300 units (enter your response as a whole number). Bearing: 200 units (enter your response as a whole number). Shaft: 200 units (enter your response as a whole number). As the production planner for Xiangling Hu Products, Inc., you have been given a bill of material for a bracket that is made up of a base, 2 springs, and 4 clamps. The base is assembled from 1 clamp and 2 housings. Each clamp has 1 handle and 2 castings. Each housing has 1 bearing and 2 shafts. There is no inventory on hand. a) Design a product structure noting the quantities for each item and show the low-level coding. Match each number in the structure below with the corresponding item. Number Item Bracket II Spring(2) Housing (2) Casting(2) Shaft(2) Base (1) IV Clamp(1) II Clamp(4) Handle(1) III Bearing(1) IV Handle(1) Casting(2)