Thursday, December 12 - This session opens with conditional summing. If you have not explored conditional summing yet, you are in for a surprise. Conditional summing is a game changer, and will absolutely improve efficiency in your reporting workbooks. We then move to removing duplicates in order to create a list of unique report labels. We conclude with lookup basics. We discuss why we prefer lookups to direct cell references and explore the details of the most popular lookup function, VLOOKUP.