Cal Corey and his wife are living in Las Vegas, Nevada, and own an apartment house from which they receive $20,000 a year in net rental income. Cal's wife also owns an apartment house, whick she purchased as an investment while she was working before their recent marriage. The net rental income from this building is $15,000 a year. If the Coreys file seperate returns what would each file for rental income on their tax returns? Please show your work.