KASEM SAVE LONG ANSAOlsem wanem oli kalkuletem hemia?
Ekstra westij i kavremap kat, paten matching, defek mo repair blong fiuja. Had plan i save nidim moa westij.
Estimate blong floaring materialEria blong material = longfala × waed × (1 + westij %)
Wan praktikol eksampol
Wan rum blong 15 × 12 ft i gat eria blong 180 sq ft. Wetem 10% westij, plan blong pem klosap 198 sq ft.