and 1 housing. Each clamp has 1 handle and 2 castings. Each housing has 1 bearing and 1 shaft. There is no inventory on hand. This exercise contains only parts b and c. The product structure is as follows: b) Determine the gross quantities needed of each item if you are to assemble 150 brackets. Base: units (enter your response as a whole number). Spring: units (enter your response as a whole number). Clamp: units (enter your response as a whole number). Housing: _ units (enter your response as a whole number). Handle: units (enter your response as a whole number). Casting: units (enter your response as a whole number). Bearing: _ units (enter your response as a whole number). Shaft: units (enter your response as a whole number)