diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java b/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java
index a5ffc3da..bedfd67f 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java
@@ -76,8 +76,8 @@ public class LineCalculator {
 		BigDecimal basisQuantity = currentItem.getBasisQuantity().compareTo(BigDecimal.ZERO) == 0
 			? BigDecimal.ONE.setScale(4)
 			: currentItem.getBasisQuantity();
-		itemTotalNetAmount = quantity.multiply(price).divide(basisQuantity, 18, RoundingMode.HALF_UP)
-				.subtract(allowanceItemTotal).setScale(2, RoundingMode.HALF_UP);
+		itemTotalNetAmount = quantity.multiply(priceGross).divide(basisQuantity, 18, RoundingMode.HALF_UP)
+			.add(lineCharge).subtract(lineAllowance).setScale(2, RoundingMode.HALF_UP);
 		itemTotalVATAmount = itemTotalNetAmount.multiply(multiplicator);
 	}
 
diff --git a/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2ZInvoiceImporterTest.java b/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2ZInvoiceImporterTest.java
index 3323c168..4d39cd98 100644
--- a/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2ZInvoiceImporterTest.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/ZF2ZInvoiceImporterTest.java
@@ -264,7 +264,7 @@ public class ZF2ZInvoiceImporterTest extends ResourceCase {
 		}
 		assertFalse(hasExceptions);
 		TransactionCalculator tc = new TransactionCalculator(invoice);
-		assertEquals(new BigDecimal("19.52"), tc.getGrandTotal());
+		assertEquals(new BigDecimal("18.92"), tc.getGrandTotal());
 	}
 
 	public void testBasisQuantityImport() {