Sales Calculation: how much was made on each kind of food?

[animestome]

Lance and Mario were working in the snack bar at the Turbulent Tunas concert. They sold hot dogs for $1.65, hamburgers for $2.35, sodas for $.85, and the combo plate with fries, salad, a hamburger, and soda for $3.89. They sold 80 items in an hour for $163.24. How many of each kind of food did they sell, and how much did they make on each kind of food?

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I have no idea how to solve it. I've been trying trial and error, but it doesn't work.

 

[animestome]

o_o Sorry. solved it.