CREATE TABLE table_48040 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "TV Time" TEXT, "Attendance" TEXT)

Which week had an attendance of 55,158?
SELECT SUM("Week") FROM table_48040 WHERE "Attendance" = '55,158'
SELECT SUM("Week") FROM "table_48040" WHERE "Attendance" = '55,158'