1,764,760 - 972,976 = 791,784 XPs missing...
The most effective points you can get for playing is 9 holes tournament once a day: 190+30 for the game + 880 as CDP. That's 1100 XPs a day.
Think of one ball per three nine hole rounds, it's 3,300 XPs per ball, 9,900 per sleeve.
Under these conditions, roughly speaking, 800,000 XPs cost 80 sleeves = 240 balls: 480 $. The rounding up might take care of the odd lost ball :)
It's not too much, Andy: 240 balls times 3 rounds/days means 720 days, that's two years, 24 months. 20 bucks a month, many ppl drink or smoke more! Where I live, one real greenfee is about 60 $...