The table has four lines. All Customers is your whole business for the period and is the line everything else is measured against. Local Fleets and National Fleets are the two kinds of fleet account, and All Fleets is the two of them added together. Across each line: NET SALES is what that group brought in, % OF NET SALES is that as a share of the All Customers figure, TICKET AVG is the average sale, CAR COUNT is how many cars went through, and % OF CAR COUNT is that as a share of all the cars.
Reading the two percentage columns together is what makes this report useful. Where the share of net sales is higher than the share of car count, that group is bringing in more per car than the shop average; where it is lower, the work is cheaper per car and you are giving up margin for the volume.
The ADD TO FAVORITES switch beside the report title saves a shortcut to the report under your favourites in the main Reports menu.