A Trader Sells 100 European Put Options I

A trader sells 100 European put options i.e. one contract) with a strike price of $50 and a time to maturity of six months. The price received for each option is $4. The price of the underlying asset is $41 in six months. What is the trader's gain or loss? Show a dollar amount and indicate whether it is a gain or a loss. _ _ _ _ _ _ _ _ _ _