HELP SOLVE C because its wrong.

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, 1 spring, and 4 clamps. The base is assembled from 1 clamp and 2 housings. Each clamp has 1 handle and 2 castings. Each housing has 2 bearings 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 (1) Housing (2) Casting (2) Shaft(2) III Base (1) IV Clamp (1) II Clamp (4) Handle (1) III Bearing (2) IV Handle(1) Casting (2) The product structure. Bracket Base (1) Spring(1) Clamp (1) Housing (2) Clamp (4) Handle (1) Casting(2) Bearing(2) | Shaft(2) Handle (1) Casting (2) b) Determine the gross quantities needed of each item if you are to assemble 75 brackets. Click the icon to view the completed product structure. Base: 75 units (enter your response as a whole number). Spring: 75 units (enter your response as a whole number). Clamp: 375 units (enter your response as a whole number). Housing: 150 units (enter your response as a whole number). Handle: 375 units (enter your response as a whole number). Casting: 750 units (enter your response as a whole number). Bearing: 300 units (enter your response as a whole number). Shaft: 300 units (enter your response as a whole number). c) Compute the net quantities needed if there are 25 of the base and 100 of the clamp in stock. Base: 75 units (enter your response as a whole number). Spring 75 units (enter your response as a whole number). Clamp: 345 units (enter your response as a whole number). Housing: 90 units (enter your response as a whole number). Handle: 245 units (enter your response as a whole number). Casting: 490 units (enter your response as a whole number). Bearing: 180 units (enter your response as a whole number). Shaft: 180 units (enter your response as a whole number). . Net Requirement of Bracket = Gross Requirement - On Hand = 75 - 0 = 75 Gross requirement of base = 1*Net requirement of bracket = 1*75 = 75 Net Requirement of base = Gross requirement of base - On Hand = 75 - 30 = 45 Gross requirement of spring = 1*Net requirement of bracket= 1*75 = 75 Net Requirement of Spring = 75 Gross requirement of clamp = 4* Net requirement of bracket + 1* Net requirement of base = 4*75 + 1*45= 345 Net Requirement of clamp = 345 - 100 = 245 Gross requirement of Housing = 2*Net requirement of base = 2*45= 90 Net Requirement of Housing = 90 Gross requirement of Handle =1*Net requirement of clamp = 1*245= 245 Net Requirement of Handle = 245 Gross requirement of casting = 2*Net requirement of clamp = 2*245= 490 Net Requirement of casting = 490 Gross requirement of bearing = 2*Net requirement of housing = 2*90= 180 Net Requirement of bearing = 180 Gross requirement of shafts = 2*Net requirement of housing = 2*90 = 180 Net Requirement of Shafts = 180