Putting in an if statement
 

I have columns of the months of the year and I would like them to pick up the
amout from a row based on month.
So column A has date and column B has an amount - all rows have this. Then I
have columns C - N have all the months totals.
Now I want to pull from column A the appropriate amount based on that date
adding to anytjhing already there.
Thanks for the help!