BTST Query. Need assistance

If I buy 100 shares of a stock on Monday and I buy more 50 stocks on Wednesday of the same company, then on Thursday I would like to sell 70 shares.

Which 70 shares are exactly sold on Thursday? The one’s from 100 shares that are delivered to me on Wed? Or an average of 100+50 shares?

Selling shares follows FIFO Method (First In First Out) So shares will be sold from 100 shares that you bought on Monday.

Thanks alot for the information!