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

https://elliottsbestnews.quillnesty.com/posts/why-are-units-so-important-when-talking-about-rates

See how a running total differs from a rate of change with parcel deliveries. Track parcels accumulated by day’s end versus parcels per hour, then compare the units and time windows to see what each number says about the day and delivery pace.