First Night on the new Job

So, I manged to offer my services to the night program where I work. They were short handed after two employees left. I decided to offer my services one night a week. Heck, its only three hours more, and the pay is worth it. It's not at much pay as I make during the day program, but it is still extra money. I plan to use this extra money to make one extra house payment a year on our mortgage. I should bring home an extra $180 dollars a month with this extra job. For those of you with excellent math skills, you should be able to figure out how much they are paying me.