Learn how a running total differs from a rate of change with parcel deliveries....

https://papa-wiki.win/index.php/How_Do_I_Spot_When_Someone_Is_Treating_Totals_and_Rates_as_Interchangeable%3F

Learn how a running total differs from a rate of change with parcel deliveries. Forty-eight parcels by noon is a total; 12 parcels per hour is a rate over a specific time window. The article explains how units and timing help you read both correctly.