His rental home is located at $2300$ Bransford Ave., Nashville, TN $37204$ and was rented all year to his tenant. The tenant occupied the home on January $1,2022,$ and pays rent of $$1,500$ per month for each month of $2022($the lease is a two$-$year lease$)$; however, Theodore required first and last months rent and a security deposit of $$500$ and all were paid on January $1,2022.$Why and How much rent income do they receive?