A running total tracks parcels delivered so far, while a rate of change shows...

https://www.bookmark-maker.win/a-running-total-tells-you-how-many-parcels-have-arrived-so-far-while-a-rate-of

A running total tracks parcels delivered so far, while a rate of change shows how quickly deliveries are happening. This article explains the difference, why units matter, and how a time window like per hour or per day can change the story.