How many goals were scored while the goalkeeper was on the ice in the 1924 WCHL by the goalie with the most goals scored?
WCHL is the league's abbreviated name which refers to lgID = 'WCHL'; most goals scored referst to MAX(PostGA); GA is abbreviation for Post Against which means number of goals recorded while the goalie is on the ice. Include all goals against during regulation and overtime play.
SELECT SUM(PostGA) FROM Goalies WHERE lgID = 'WCHL' AND year = '1924' GROUP BY playerID ORDER BY SUM(PostGA) DESC LIMIT 1