Getting a bit confused with mining!

[wilhil]

hopefully this is my Last question, I can not figure out mining, I created a mineral mining ship out of a frigate, and I was wondering how am i meant to make a profit, on the window it says maintence 2365 and mining amount 2160, and obviously when you detuct these, it costs more maintence, but on the empire status my total mineral goes up, so I was wondering how much am i making?