Slovin entered into a month-to-month tenancy of an apartment for $450 per month. When he married, his wife moved in with him. The landlord did not discover this until three months later. The landlord told Slovin that he owed an extra $100 per month for the time during which the wife had also occupied the apartment. In addition, he told Slovin that the rent for the next month would be $600. What are Slovin’s legal obligations to the landlord?