A very simple product (A) consists of a base (B) and a casting (C). The base consists of a plate (P) and three fasteners (F). There are currently 30 castings and 100 bases on hand. Final assembly takes one week. The casting has a lead time of three weeks. All other parts have one-week lead times. There are no scheduled receipts. All components use the lot-for-lot technique. The master schedule requires 80 units of product A in week 5 and 120 in week 8. Produce the MRP tables for the upcoming eight weeks for A and B and C