A parcel total counts all parcels in so far. A rate shows parcels per day. This...

https://www.pop-bookmarks.win/this-article-explains-how-a-running-total-differs-from-a-rate-of-change-using

A parcel total counts all parcels in so far. A rate shows parcels per day. This article shows why a daily rate and weekly total answer different questions, and how units and time windows help you read the numbers right and spot a change in pace at work.