IF THEN Conditional Formatting

[lgano]

I am working on a spreadsheet which has different values in column B (values are 3, 4, A, B, C). I am trying to create a conditional format that will highlight column E.
Each item in column B has a value that needs to be met. Example A requires at least 160, C requires at least 32

I would like column E to be highlighted red if the number in column E is less than the requirement (example 160) and green if greater than or equal to requirement.

This sounds really simple, but I am struggling!

Thanks in advance!

 

[Special-K99]

What are ALL the values that need to be met and what value in column B does each one relate to?

 

[lgano]

If B2 is...
3 then E2 needs to be greater than (or equal to) 96
4-> 24
A-> 160
B-> 64
C-> 32