Running totals and rates of change answer different questions: how much has...

https://www.bookmarks4all.win/learn-how-a-running-total-of-parcels-delivered-differs-from-a-rate-in-parcels

Running totals and rates of change answer different questions: how much has built up, and how quickly is it changing? This article uses parcel deliveries to show the difference between a cumulative count and parcels per hour