2022-6-30 · 2. R10,000. R12,800. 1,200m 3 /day. 1. R22,800. R45.60/m3. If we keep the contractor to his BOQ rate, this reduction in quantity will cause a substantial R34,75/m3 or a rounded total R17K loss for the contractor, just in terms of cost. If a 10% profit applied, it will cause a further R106K loss in total profit!