Well I don't know how many bags of fruit she is buying.. so I just assumed she was buying 2 bags..
4.50 + 4.50 = 9
9 + 3.25 = 12.25
Then she still has her bill of 25 cents..
12.25 + 0.25 = 12.50
If she has 17 dollars to start with just do the equation 17 - 12.50 = blank
Your answer is she has 4 dollars and 50 cents left or 4.50
Hope this helps!