why we but 850 in the answer table and in the question it is 250?

(6) Salalah Electro-Mechanical Company manufactures a product PQR345. The product PQR345 consists of two PQ890 assemblies, three QR432 assemblies and one PR678 assembly. The PQ890 assembly consists of one P456, two Q921 and one Q239. The QR432 assembly consists of three P456, one R478 and two S590. (1) Prepare a Bill of Material (BOM) product tree for the product PQR345. [2] (ii) Using Table Q3(b)-1 and Table Q3(b)-2 complete the Material Requirements Planning (MRP) calculations to determine when the Purchase Orders should be placed for item S590. Note: The product PQR345 are being sold complete as well as the spare parts (e.g. items QR432, PQ890, R478 etc) are being sold separately also. Week PQR345 QR432 14 10 70 100 Table Q3(b)-1 12 120 11 50 13 60 250 90 15 100 150 16 40 100 Table Q3(b)-2 Lead Time Batch (Weeks) Jon Hand Size Safety Stock Item 350 200 10 PQR3450 QR432 2 $590 350 850 300 600 150 350 Ang) i) Bill of Material for. POR 345 PAR 345 PR678 PS, 890 2 no GR 432 3 ne P456 6239 R438 7456 921 S530 2no 1) POR: 345 nied) - 3626, 3530 1 OR 432 2,5590 MRP for PARIS 13 14, IS, Grom Requirement (GR) 7:50520Go 90 op.40 Scheduled Receipts (SR) O hand com) 357 350 230 230 1050 160,60 1 Net Requirement Planned Orlen Rhe (Por) Planned orden Release (Pore) 2 S so 1 MRP for GR 932 10 GR SR OM (350) 350 250 NR POR Pore 900 300 150 1o. See for product OR_432 On hond it the Sa felny Stock Since QR432 is erecursor for PORSS des alte added in verbent the demand for POR 345 MRP Por SS3 Demand of ScSo is depend over the waitement of QR42. O hond consist the Safety Stock 1 14 15 9 10 11 G.R SR OH (85) 850 850 NR POR 1800 Pore S508S 850 850 too 16 Reply