# BR-CO-13 — Net total inconsistent

> https://billhorse.com/en/rules/br-co-13/

## What does this error mean?

BT-109 = BT-106 − allowances (BT-107) + charges (BT-108).

## How to fix it

Include document-level allowances/charges in the formula; treat missing BT-107/108 as zero.