Looking for a sollution with If statements

[ErikVegas]

Hello, I am trying to write a formula in Excel 2003. I have a nice nested IF statement that works fine:
=IF((AND(A2>=0,A2<=250)),30,IF((AND(A2>=251,A2<=500)),37.5,IF((AND(A2>=500,A2<=750)),55,IF((AND(A2>=751,A2<=1000)),60,IF((AND(A2>=1001,A2<=1250)),82.5,IF((AND(A2>=1251,A2<=1500)),90,))))))
the problem is I am hitting the cap on the number of statements I can have in a formula. I need to be able continue the function of the above formula for 25 seperate responses to the value of cell A2. What would my best course of action be on how to resolve this issue? Do any of you have examples on how to work around this?

Thanks,

Erik