The landing is actually irrelevant… you get 80% for the UA and the missing 20% for landing… it’s just easier to add it so you can see you never get 100% of the reward on the stat card, only 92%.
You could also just calculate 80% of the expected reward. So 24,450 x 80% = 19,560
Instead he gets about 18,000 per UA.
Where is the missing 1,560?