Detailed Breakdown of Costs: Materials: Concrete Works: Cement (bags) : 20 bags @ PHP 250 each = PHP 5,000 Sand (cubic meters) : 2 cubic meters @ PHP 1,500 each = PHP 3,000 Gravel (cubic meters) : 2 cubic meters @ PHP 1,500 each = PHP 3,000 Concrete hollow blocks (pcs) : 150 pcs @ PHP 15 each = PHP 2,250 Steel bars (pcs) : 15 pcs @ PHP 500 each = PHP 7,500 Roofing: Transparent roofing sheets (pcs) : 8 pcs @ PHP 1,200 each = PHP 9,600 Wood for framing (board feet) : 80 board feet @ PHP 50 each = PHP 4,000 Flooring and Walls: Tiles for flooring (sqm) : 8 sqm @ PHP 500 each = PHP 4,000 Tiles for walls (sqm) : 15 sqm @ PHP 500 each = PHP 7,500 Plumbing: Pipes and fittings : Estimated = PHP 3,000 Drainage system materials : Estimated = PHP 2,000 Electrical: Wiring, switches, and outlets : Estimated = PHP 2,000 Lighting fixtures : Estimated = PHP 2,500 Finishing Materials: Paint (liters) : For both interior and exterior surfaces = PHP 3,000 Miscellaneous materials : Sealants, adhesives...