In some instances Dates were missing from the bottom labels. If those dates are not in our list, then our actually values being reported are skewed.
We are telling the user that this is the value across the period, but if dates are missing the sales/days in period would not be the same as sales/dates(minus the missing ones)
Hope that makes sense when you look at it later.
But instead of say 180 day period, there might only be 175 days, so are math would be actually adding more per day, since we are diving by less days than actually exist in the period, not dates list.