Please write out, step-by-step, how you obtained the correct answer for this math problem.

Jose and Zola want to purchase their first home. Jose makes $23.50 an hour and works 40 hours per week. Zola makes $21.50 an hour and works 40 hours of regular time and 5 hours of overtime a week. They have two car payments totaling $500 a month and one credit card with a minimum payment of $50 a month. What is their combined gross monthly income?