CREATE TABLE table_74675 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

How much is the sum of every crowd in attendance when the away score was 7.13 (55) for Richmond?
SELECT SUM("Crowd") FROM table_74675 WHERE "Away team score" = '7.13 (55)' AND "Away team" = 'richmond'
SELECT SUM("Crowd") FROM "table_74675" WHERE "Away team score" = '7.13 (55)' AND "Away team" = 'richmond'