I'm trying to get this formula field to display the correct field for the correct year. The values of the picklist at 2014, 2013, 2012. The related fields are just numbers. There are no syntax errors but it's returning nothing - not even the else result field.
CASE( Commercial_Sales_Year__c, "2014", of_commercial_customers_2014__c , "2013", of_commercial_customers_2013__c , "2012", of_commercial_customers_2012__c, 0)
What am I missing?