S. 69C : Unexplained expenditure – Bogus purchases- Business of Civil Contactor – Even if the purchases made by the assessee are to be treated as bogus, it does not mean that entire amount can be disallowed- As the AO did not dispute the consumption of the raw materials and completion of work, only a percentage of net profit on total turnover can be estimated. [ S. 37(1), 68 ]