Loads the last 12 months by default (current month partial). Add/swap up to 13 periods — each its own section — then pick any two for the Δ. Sales, Ad Spend, Units & TACoS by portfolio.
Add a period to begin
Each period you add becomes its own section (Sales, Ad Spend, Units, TACoS). Then pick any two periods in the Δ header to see the change between them.