Why doesnt the CASH FLOW data from Screener add up?

https://preview.redd.it/82qehy3bz0ae1.png?width=1705&format=png&auto=webp&s=ef65c88019cc55d7df4d5fe3aa7c1e31447a81f8 https://preview.redd.it/mojqtuzez0ae1.png?width=1435&format=png&auto=webp&s=0d02c0a4d452010992378bea72677e3dd17e6d97 When I tried to manually tally the Cash Flow from OPA, the figures didn't add up to the above figures. Why is this so?