Adams leased an apartment to Baker for $600 a month, payable the last day of each month. The term of the written lease was from January 1, 2011, through April 30, 2012. On March 15, 2011, Baker moved out, telling Adams that he disliked all the other tenants. Adams replied, “Well, you’re no prize as a tenant; I can probably get more rent from someone more agreeable.” Baker sent the apartment keys to Adams by mail. Adams wrote Baker, “It will be my pleasure to hold you for every penny you owe me. I am renting the apartment on your behalf to Clay until April 30, 2012, at $425 a month.” Baker had paid his rent through February 28, 2011. Clay entered the premises on April 1, 2011. How much rent, if any, may Adams recover from Baker? Please explain.