0 49.99 0
50 59.99 2500
60 69.99 5000
70 79.99 7500
80 100 10000

I don't know how to do this. If I enter a number between 0 and 100 in cell A1, I want cell B1 to automatically enter the number from cells C3,4,5,6,or 7.

Example, if I enter 65 in A1, B1 should say 5000. If I enter 85 in A1, then B1 should say 10000.

How do I do this?