Table:
text: 1981 PGA Tour
Leaders
Leaders
Rank_ Player Country Earnings_ Wins
1 Jack Nicklaus United States 3759425 70
2 Lee Trevino United States 2608792 28
3 Tom Watson United States 2549900 28
4 Tom Weiskopf United States 2006810 15
5 Hale Irwin United States 1966373 13

Question: What is the lowest earnings of Lee Trevino who has 28 wins from 1981 PGA Tour's Leaders?