Table:
text: 1988 PGA Tour
Tournament results
Tournament results
Date_ Tournament Location_ Winner Score _1st_prize_
Aug 28 NEC World Series of Golf Ohio Mike Reid (2) 275 (–5) 162000
Aug 28 Provident Classic Tennessee Phil Blackmar (2) 264 (–16) 81000
Sep 4 Canadian Open Canada Ken Green (3) 275 (–13) 135000
Sep 11 Greater Milwaukee Open Wisconsin Ken Green (4) 268 (–20) 126000
Sep 18 Bank of Boston Classic Massachusetts Mark Calcavecchia (3) 274 (–10) 108000
Sep 25 B.C. Open New York Bill Glasson (2) 268 (–16) 90000
Oct 2 Southern Open Georgia David Frost (1) 270 (–10) 72000
Oct 9 Gatlin Brothers-Southwest Golf Classic Texas Tom Purtzer (3) 269 (–19) 72000
Oct 16 Texas Open Texas Corey Pavin (7) 259 (–21) 108000

Question: In the 1988 PGA Tour tournament results, what was the 1st prize if the winner was Ken Green (4)?