expression question

I'm new at SSRS 2008 R2.  I need to return a value from PERCENT_NUM if DESCRIPTION = 'x'.  PERCENT_NUM is a numeric field and DESCRIPTION is a string field.  The DESCRIPTION field has multiple items that I need to turn into columns then list the equivalent value for the facility name.  The data is grouped by facility names.  I have a column called "Decreased Dosage [$]" and enter the expression below in the text box.  I have about 60 facility names and all but 1 are returning 0 values. 

Thanks.