Kara had $58.25 after buying a calculator. How much money did Kara have before she bought it if the calculator cost $13.45?

Let x be the amount of money Kara had before buying the calculator.

After buying the calculator, Kara had x - 13.45 = 58.25.
Adding 13.45 to both sides, we get x = 58.25 + 13.45 = <<58.25+13.45=71.7>>71.7
Kara had $71.7 before buying the calculator. Answer: \boxed{71.7}.