CREATE TABLE table_41314 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" TEXT)

What is the sum of Week when there were 67,968 people in attendance?
SELECT SUM("Week") FROM table_41314 WHERE "Attendance" = '67,968'
SELECT SUM("Week") FROM "table_41314" WHERE "Attendance" = '67,968'