diff --git a/library/src/main/java/org/mustangproject/Allowance.java b/library/src/main/java/org/mustangproject/Allowance.java
index e378f767..d8b5f3fe 100644
--- a/library/src/main/java/org/mustangproject/Allowance.java
+++ b/library/src/main/java/org/mustangproject/Allowance.java
@@ -3,8 +3,10 @@ package org.mustangproject;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonInclude;
+import org.mustangproject.ZUGFeRD.IAbsoluteValueProvider;
 
 import java.math.BigDecimal;
+import java.math.RoundingMode;
 
 /***
  * (absolute) allowances on item and document level
@@ -29,6 +31,22 @@ public class Allowance extends Charge {
 
 	}
 
+
+
+	@Override
+	public BigDecimal getTotalAmount(IAbsoluteValueProvider currentItem) {
+		if(totalAmount != null) {
+			return totalAmount;
+		} else if (percent!=null) {
+			BigDecimal singlePrice=currentItem.getValue().divide(BigDecimal.ONE.add(getPercent().divide(new BigDecimal(100))),  18, RoundingMode.HALF_UP);
+//			BigDecimal singlePrice=currentItem.getValue().multiply(BigDecimal.ONE.subtract(getPercent().divide(new BigDecimal(100))));
+			BigDecimal singlePriceDiff=currentItem.getValue().subtract(singlePrice);
+			return singlePriceDiff;
+		} else {
+			throw new RuntimeException("percent must be set");
+		}
+	}
+
 	/***
 	 * Always to return false for IZUGFeRDAllowanceCharge
 	 * @return false since its not supposed to be calculated negatively
diff --git a/library/src/main/java/org/mustangproject/Charge.java b/library/src/main/java/org/mustangproject/Charge.java
index 2e928fe5..c906a704 100644
--- a/library/src/main/java/org/mustangproject/Charge.java
+++ b/library/src/main/java/org/mustangproject/Charge.java
@@ -145,9 +145,9 @@ public class Charge implements IZUGFeRDAllowanceCharge {
 		if(totalAmount != null) {
 			return totalAmount;
 		} else if (percent!=null) {
-//			BigDecimal singlePrice=currentItem.getValue().divide(BigDecimal.ONE.add(getPercent().divide(new BigDecimal(100))),  18, RoundingMode.HALF_UP);
-			BigDecimal singlePrice=currentItem.getValue().multiply(BigDecimal.ONE.subtract(getPercent().divide(new BigDecimal(100))));
-			BigDecimal singlePriceDiff=currentItem.getValue().subtract(singlePrice);
+			BigDecimal singlePrice=currentItem.getValue().divide(BigDecimal.ONE.add(getPercent().divide(new BigDecimal(100))),  18, RoundingMode.HALF_UP);
+//			BigDecimal singlePrice=currentItem.getValue().multiply(BigDecimal.ONE.subtract(getPercent().divide(new BigDecimal(100))));
+			BigDecimal singlePriceDiff=currentItem.getValue().add(singlePrice);
 			return singlePriceDiff;
 		} else {
 			throw new RuntimeException("percent must be set");
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java b/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java
index 08702773..5cff3f9b 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/LineCalculator.java
@@ -93,7 +93,7 @@ public class LineCalculator {
 			: currentItem.getBasisQuantity();
 		itemTotalNetAmount = quantity.multiply(price).divide(basisQuantity, 18, RoundingMode.HALF_UP)
 			.add(lineCharge).subtract(lineAllowance).subtract(allowanceItemTotal).setScale(2, RoundingMode.HALF_UP);
-		itemTotalVATAmount = itemTotalNetAmount.multiply(multiplicator);
+		itemTotalVATAmount = itemTotalNetAmount.multiply(multiplicator).setScale(2, RoundingMode.HALF_UP);
 	}
 
 	public BigDecimal getPrice() {