I don't think that's how it works -- the bonuses aren't additive round to round. From NBA Cup prize money: How much players make for winning title as bonuses increase in 2024
Nevertheless, he makes $1.89M this year. So it's a cool 27% holiday bonus.
I was going off what the announcers said the Lakers made last year. Could have been wrong, I’ve seen both sides reported.

NBA In-Season Tournament Prize Pool: How Much Do the Winners Get?
LeBron James and the Lakers look to defend their 2023 tournament title.
Either way good chunk of change.