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---
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.
