Clarify about the u/s 269 st

1. If we sell goods to Mr. A worth of Rs. 5 lacks and he paid Rs.2 lac by way of cash and Rs. 3 lac paid through cheque in the accounting period (not a single day) 2. If we sell the goods to Mr.A with three different bills of Rs. 1 lac each on various dates and he cash paid the Rs. 1lac each on various days of accounting period. My Query is the section of 269 ST applicable for on the above 2 cases or not (3) Mr. A buy the goods on cash and paymented different dates not a single day