SUM and Group using IN clause

Hi, I am looking for a way to create a query to SUM and Group BY by using IN clause similiar to below.Is this possible or is another method recommended?SELECT CID, SUM(Hours) WHERE CID IN mycodes,FROM MyClrTblWHERE MyCodes IN ('Full', 'part', 'Contract')GROUP BY ID, MyCodes Basically, I want to end up with a table that shows:ID Full Part Contract and the values for each underneath each row.