SQL Crosstab Totals

I want to take the Sum of Pledge_Amount when If_Yes_Pledge_Or_Credit_Card =2 This is part of a CrossTab Query.
Pledge is 'Currency'
If_Yes_Pledge_Or_Credit_Card is 'int'
Sum(Case o.If_Yes_Pledge_Or_Credit_Card When 2 Then Pledge_Amount

					Else ''
					End) '% of Total Yes $  on CC'