Question: What's the average that has a total more than 263648, a high of 31564, and ranking of 1st?
SQL: SELECT SUM("Average") FROM "2-18639024-5" WHERE "League Ranking" = '1st' AND "Total" > 263648.0 AND "High" = 31564.0;

Question: What's the total of the 2012-13 season when they're ranked 1st, a high more than 31884 and an average more than 15234?
SQL: SELECT "Total" FROM "2-18639024-5" WHERE "League Ranking" = '1st' AND "High" > 31884.0 AND "Average" > 15234.0 AND "Season" = '2012-13 season';