Problem 21-9 (Algo) Semans is a manufacturer that produces bracket assemblies. Demand for bracket assemblies (X) is 131 units. The following is the BoM in indented form: ITEM DESCRIPTION Bracket assembly USAGE A Wall board B Hanger subassembly D Hanger casting E Ceramic knob C F G Rivet head screw Metal tong Plastic cap 15232442 Below is a table indicating current inventory levels: Item Inventory X A B C D E F G 28 19 70 16 197 280 1,225 100 b. What are the net requirements of each item in the MPS? (Leave no cells blank - be certain to enter "O" wherever required.) Item Net Requirements A B C D E F G