SOLUTION: I think this is the right section, I have a question that's been bothering me for a while. Here it is: The college bookstore sells three types of graphing calculators (GC1, GC2,

Question 29384: I think this is the right section, I have a question that's been bothering me for a while. Here it is:
The college bookstore sells three types of graphing calculators (GC1, GC2, and GC3). They have a total of 40 calculators to sell. The total amount of revenue (exclude tax) that the bookstore would receive is $3,590. The lowest price calculator, GC1, is $75 less than the most expensive type GC3. Find the price of each type of calculator.
I tried to do it in a three variable system, like I'm supposed to, but I'm having trouble coming up with the third equation. I got A + B + C = 40 and A = C - 75, but I can't get the other one. Please help.
Answer by Nate(3500) (Show Source): You can put this solution on YOUR website!
wouldn't the third cost be:
B=3590-((c-75)+(a+75)) the total cost minus the prices of the other two calculators
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