I work for a bus company that has 240 different routes. I also have a table
in Excel that lists monthly ridership for each route. I use it as a lookup
table to get data for another report. The problem? There are 6 of the 240
routes that are served by more than one garage so they appear twice in the
lookup table and I would like to get the sum of the ridership for that
particular route from the table. Is this possible and if so how do I do it?