Four items are needed to assemble chairs. Use the information in the tables below to answer the following questions. Week # 2 3 4 5 6 8 MPS Quantity 40 50 60 70 60 Item # 1 2 3 4 Quantity needed to assemble one chair 2 3 1 2 Lot size order quantity 300 400 250 300 Lead Time 2 wk 1 wk 3 wk 2 wk Available inventory at week 1 100 130 150 120 The gross requirement of item #2 in week 3 is: A) 120 units B) 180 units C) 150 units D) 210 units