The math is simple; the habit is the hard part. A unit's floorplan cost is the amount financed times your annual rate, spread over the days it sits — a few dollars a day that most stores only add up at month-end, if at all. Multiply it across the lot and stretch it over the aging you already carry, and floorplan quietly becomes one of the largest line items nobody watches daily.
This is an estimate for planning. Real floorplan carries curtailments, tiered rates and per-lender terms, and it moves every time you stock or sell a unit. That's exactly why it belongs on a live screen rather than a spreadsheet — the Floorplan module tracks it unit by unit, and the daily KPI dashboard keeps aging in front of you before it compounds.