Adds a usage update into a record and returns the sum; neither argument changes. Amounts add up, and a running
total keeps the larger value (an inbound running total only grows). Seconds keep millisecond precision; counts are
whole numbers. A field that is not a finite number of at least 0 contributes nothing.
Adds a usage update into a record and returns the sum; neither argument changes. Amounts add up, and a running total keeps the larger value (an inbound running total only grows). Seconds keep millisecond precision; counts are whole numbers. A field that is not a finite number of at least 0 contributes nothing.