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

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

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