Help find two rates

[Lors]

Please help me get the equation necessary to find the two rates for this problem.

There are 104 items sold at two rates.
79 items were sold at rate1 while 25 items were sold at rate2.
the total sale was 25000.

thanks in advance

 

[Lors]

I was just asked this question and couldn't get to any solution
I'm glad i wasn't wrong.

Thanks a lot!