How much money i will need on 1 aug to sell shares which i buy tomorrow

I want to buy shares worth 380000 tomorrow. how much money i will need if i want to exit this position on or after 1 aug? As per new sebi rules

You won’t need any margin to exit stock from your holdings, as explained below.

In case of BTST, if you read the post, the scenario for BTST too has been explained there.