CREATE TABLE table_name_53 (volume_lbs VARCHAR, set_4 VARCHAR)

How many lbs does a set 4 of 115lb x 8reps have?
SELECT volume_lbs FROM table_name_53 WHERE set_4 = "115lb x 8reps"
SELECT "volume_lbs" FROM "table_name_53" WHERE "115lb x 8reps" = "set_4"