HRM - Gross vs. net calories?

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Hey y'all. Quick q - I've got a Polar A300. When it shows my calorie burn during/after a workout, is it showing me my gross calories burned during that time, or the net calories I burned for working out? My apologies if this has been asked before; I'm not getting a straight answer in my searches. I've also emailed Polar customer support, but wondered if anyone here has thoughts on this as well.