In an assembly system, components W, X, Y and Z need 1, 2, 2 and 1 units of part B, respectively. The bill of materials (BOM or POR) of these components are given in the table below, in which the beginning inventory of part B is given in the parenthesis (i.e., 200 units of part B). The vendor operates under a variable lot-sizing policy of 1000 units of part B with a 2-day lead time. Determine the plan orders release for part B if the bill of materials (BOM) for the components are given in the table for a 12-period (in days) planning horizon [Complete the 2nd table to answer the question]. 1 2 11 12 Component W X Y Z B (20 Number of Part B needed 1 2 2 Periodic BOM: Planned Order Release (POR) 3 4 5 6 7 8 9 10 80 200 125 50 500 100 80 200 125 50 400 300 40 600 375 150 600 300 160 400 650 100 400 200 ? ? ? ? ? ? ? ? 1 ? ? Lot size: Leadtime, L: Part B Time Period, t Type: V= 1 2 Present period: 10 11 12 3 4 5 6 7 8 9 Gross requirements (GR) Beginning Inventory (BI) Net requirements (NR) Planned Order Release (POR)