Materials needed and total cost of doing a decking of 251 sqm

MATERIALS FOR DOING A DECKING ON ABOUT 251 SQUARE METRES. TOTAL COST OF THE DECKING IS N3,300,000.00 1. 10 TON TRIPS OF SAND 7 2. 45 TONS OF STONE CHIPPINGS 3. 210 BAGS OF CEMENT 4. 85 LENGTHS OF Y16 RODS 5. 310 LENGTHS OF Y16 RODS 6. 60 LENGTHS OF Y8 RODS 7. 2 ROLLS OF BINDING WIRE 8. 322 1x12x12 WOOD 9. 75 1x6x12 WOOD 10. 120 2x3x12 11. 2 BAGS OF NAILS 3" 12. 1/2 BAG OF NAIL 2" 13. 380 LONG BAMBOO 14. ELECTRICAL PIPING ITEMS 20mm pipes 7 bundles 25mm pipes 1 bundle  20mm couplers 2 pkts  25mm couplers 20 pics Male bush 2 pkts  4 ways plastic box 2 pkts  3x3 knockout boxes 50 3x6 knockout boxes 55  U box 1 pkt Y box 1 pkt Gum 2 tins  Cooker box 1  Bending spring 2