See how a running total differs from a rate of change through parcels and rain....

https://remote-wiki.win/index.php/How_Do_I_Convert_a_Cumulative_Total_into_an_Average_Rate_per_Hour%3F

See how a running total differs from a rate of change through parcels and rain. Learn to check units and time windows: packages delivered so far is a count, while inches of rain per hour is a rate