Burn rate

Because one annual invoice or a delayed payroll run can double or halve a single month. The average over a window is the figure you can plan against.

Yes. Ask for a different number of months and the skill recomputes, and it always states the window it used.

The skill reports how much of the window actually carried spend. An average over a mostly empty window is flagged rather than presented as fact.

It measures it, and it refuses to guess. Some feeds record an outflow as a negative amount and some record it as a positive magnitude, so the direction is elected once over the whole window from the counts on each side. A window that carries a large share of both is two feeds pooled together, and the skill reports it as mixed rather than reducing it to one figure.

It says so. An exclusion count that comes back empty means nobody measured it, not that nothing was excluded, and the skill reports it as unmeasured rather than as none. The same holds for the whole reading: a sum that came back with nothing in it is not a burn of zero, so the skill stops and offers to read again.

The sum always groups by currency, so a multi-currency window comes back as one row per currency. The skill converts each one into your base currency at a rate it states, and never presents a single total as though no conversion happened.