using IF function to use different formulas depending on different rules

[Tnashnhsp1]

Hi,

I have got to this stage with a formula but cannot understand why it isn't working:

=IF(OR(A2=1,A2=2),(MIN(B2:B6)+50),(MAX(B2:B6)+50))

If A2 equals 1, I want it to add 50 on to the smallest (earliest) date in C2:C5.

BUT

If A2 equals 2, I want it to add 50 on to the largest (latest) date

The formula just adds 50 on the smallest (earliest) date, whether A2 equals 1 or 2.

What am I doing wrong?

Any help or advice would be much appreciated.

Toby