How are metrics calculated for delivered fuels?
For example, if you had fuel oil delivered on March 10, then March 1 would be the Start Date and March 31 would be the End Date. Months with no delivery are counted with zero consumption. Even if a delivery came on March 31, it is counted only for the month of March.
If your "Date Meter Became Active" is AFTER the first of the month with your first delivery, your consumption will be prorated based on the number of days the meter was active that month. In most cases, you will want to make sure your "Date Meter Became Active" is on the first of the month of your first delivery, or earlier.