How can I get a numeric sum from a yes/no box in access?

[ivwshane]

I need a way to add up a column of yes/no check boxes so I can at least get a whole number for yes's.
Is there a way I can assign a yes value a 1 and a no value a 0 so that when I go to add up the column I get a numeric value to tell me how many yes's I have?