CREATE TABLE table_name_24 (since VARCHAR, goals VARCHAR, transfer_fee VARCHAR)

What is the since year for the player with more than 3 goals and a transfer fee of 400k?
SELECT since FROM table_name_24 WHERE goals > 3 AND transfer_fee = "£400k"
SELECT "since" FROM "table_name_24" WHERE "goals" > 3 AND "transfer_fee" = "£400k"