Working backward, perform the same computations all other items to determine the net quantities. Click the icon to view the completed product structure. Spring: 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)