compute-total-gross

name	compute-total-gross
description	Compute total gross per unit as front plus F&I back, with penetration. Reach for this on a deal-profitability question.

Skill: Compute total gross

Front gross alone understates deal profitability (§3 #3).

Step 1 — Set front and back

Front (vehicle) gross and F&I back-end gross per the period.

Step 2 — Combine per unit

(front + back) × units, then per-unit, via automotive_dealership_calc.py gross-per-unit (§3 #3).

Step 3 — Derive F&I penetration

Back-end gross relative to units retailed (PVR) (§3 #4).

Step 4 — Separate deal quality

A thin-front/strong-back deal vs a fat-front/no-back one (§3 #3).

Output

A total-gross read per unit with F&I penetration and deal-quality separation.