# BR-KSA-EN16931-11

Source: https://xmlvalid.com/rules/BR-KSA-EN16931-11

> Invoice line net amount (BT-131) must equal (Invoiced quantity (BT-129) * (Item net price (BT-146) / item price base quantity (BT-149))-) + Sum of invoice line charge amount (BT-141) - Sum of invoice line allowance amount (BT-136).

- Level: warning
- Rule sets: ZATCA e-invoicing rules (Saudi Arabia) SDK 3.4.6
- Context: `cac:InvoiceLine`
- Test: `((exists(cac:Price/cbc:BaseQuantity) and xs:decimal(cbc:LineExtensionAmount) = xs:decimal(cbc:InvoicedQuantity) * ((xs:decimal(cac:Price/cbc:PriceAmount) div xs:decimal(cac:Price/cbc:BaseQuantity)) - xs:decimal(sum(cac:Price/cac:AllowanceCharge/cbc:Amount))))) or ((not(exists(cac:Price/cbc:BaseQuantity)) and xs:decimal(cbc:LineExtensionAmount) = xs:decimal(cbc:InvoicedQuantity) * xs:decimal(cac:Price/cbc:PriceAmount) - xs:decimal(sum(cac:Price/cac:AllowanceCharge/cbc:Amount))))`

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