CREATE TABLE table_77799 ("Player" CLOB, "Club" CLOB, "League" FLOAT, "Play-offs" FLOAT, "FA Cup" FLOAT, "FA Trophy" FLOAT, "Total" FLOAT)

What mean total had a league number of 18, Richard Logan as a player, and a play-offs number smaller than 1?
SELECT AVG("Total") FROM table_77799 WHERE "League" = '18' AND "Player" = 'richard logan' AND "Play-offs" < '1'
SELECT AVG("Total") FROM "table_77799" WHERE "League" = '18' AND "Play-offs" < '1' AND "Player" = 'richard logan'