Grand Daughter needs a Calculator., Graphing, A,B,C , Symbols, Signs

[Microman]

My aspergers Grand Daughter is insisting on getting an expensive calculator. (Actually wife spent 125-25 for about $95 for a calculator at target). I was floored that a 10th grader would have to spend that much money on a calculator.

What can I do, where can I look, to find a good deal on a calculator that would do all that she needs.

Or recommendations.

Thanks.