This article shows how a running total differs from a rate of change, using...

https://beausbestthoughtss.opalvector.com/posts/if-20-parcels-became-50-parcels-in-3-hours-what-is-the-rate

This article shows how a running total differs from a rate of change, using parcels as an example. See how units like parcels and parcels per hour, plus the time window you choose, help you read a shipping chart and avoid mixing a total with a pace.