New feature request: It would be great if we were able to create an aggregate total of 'total contacts seen in this search' or 'total contributions in this search'

Secondary feature: It would be helpful if this feature were filterable in form builder so that we could filter "total for donors under X date range" and by other features

Tertiary feature: It would be additionally helpful if this feature included aggregates such as averages and sums across donation amounts and other aggregate features