The AO or the FAA have not rejected the books of accounts of the assessee nor have doubted the purchases made by it. The recognised principles of accountancy and tax jurisprudence hold that no sales can take place without purchases. Thus, the case under appeal is not about non genuineness of purchases itself, but it is about non genuineness of suppliers. Whether provisions of section 69C of the Act can be applied in the matters where all the purchase and sales transactions part of regular books of accounts. Basic precondition for invoking the section 69C is that the expenditure incurred by the assessee should be out of books of accounts. Here, the payments to the suppliers, as stated earlier, have been made by cheques. So, it cannot be held that expenses were incurred by the assessee outside the books of accounts. Section 69C was introduced in to the statute with a specific purpose