diff --git a/i18n/Babydatenbank-labels_de.properties b/i18n/Babydatenbank-labels_de.properties
index 8b13438..4f31618 100644
--- a/i18n/Babydatenbank-labels_de.properties
+++ b/i18n/Babydatenbank-labels_de.properties
@@ -19,7 +19,9 @@ condition=Zustand
 size=Größe
 
 articleCount=Anzahl Artikel
-originalPriceSum=Summe der Originalpreise
+originalPriceSum=Summe Originalpreise
+buyPriceSum=Summe Einkaufspreise
+sellPriceSum=Summe Verkaufspreise
 # ???
 Cards=Karten
 and=und
\ No newline at end of file
diff --git a/src/com/yourcompany/babydatenbank/model/Brand.java b/src/com/yourcompany/babydatenbank/model/Brand.java
index 3864887..9896513 100644
--- a/src/com/yourcompany/babydatenbank/model/Brand.java
+++ b/src/com/yourcompany/babydatenbank/model/Brand.java
@@ -58,8 +58,13 @@ public class Brand {
 	public BigDecimal getOriginalPriceSum() {
 		BigDecimal r = BigDecimal.ZERO;
 				
-		for (Article e : articles) {
-			r = r.add(e.getOriginalPrice());
+		for (Article elem : articles) {
+			try {
+				r = r.add(elem.getOriginalPrice());
+			}
+			catch(NullPointerException e) {
+				r = r.add(BigDecimal.ZERO);
+			}
 		}
 		
 		return r;
@@ -70,8 +75,13 @@ public class Brand {
 	public BigDecimal getBuyPriceSum() {
 		BigDecimal r = BigDecimal.ZERO;
 		
-		for (Article e : articles) {
-			r = r.add(e.getBuyPrice());
+		for (Article elem : articles) {
+			try {
+				r = r.add(elem.getBuyPrice());
+			}
+			catch(NullPointerException e) {
+				r = r.add(BigDecimal.ZERO);
+			}
 		}
 		
 		return r;
@@ -82,8 +92,13 @@ public class Brand {
 	public BigDecimal getSellPriceSum() {
 		BigDecimal r = BigDecimal.ZERO;
 		
-		for(Article e : articles) {
-			r = r.add(e.getSellPrice());
+		for(Article elem : articles) {
+			try {
+				r = r.add(elem.getSellPrice());
+			}
+			catch(NullPointerException e) {
+				r = r.add(BigDecimal.ZERO);
+			}
 		}
 		return r;
 	}
diff --git a/src/com/yourcompany/babydatenbank/model/Category.java b/src/com/yourcompany/babydatenbank/model/Category.java
index 1173f9c..9c681de 100644
--- a/src/com/yourcompany/babydatenbank/model/Category.java
+++ b/src/com/yourcompany/babydatenbank/model/Category.java
@@ -56,8 +56,13 @@ public class Category {
 	public BigDecimal getOriginalPriceSum() {
 		BigDecimal r = BigDecimal.ZERO;
 				
-		for (Article e : articles) {
-			r = r.add(e.getOriginalPrice());
+		for (Article elem : articles) {
+			try {
+				r = r.add(elem.getOriginalPrice());
+			}
+			catch(NullPointerException e) {
+				r = r.add(BigDecimal.ZERO);
+			}
 		}
 		
 		return r;
@@ -68,8 +73,13 @@ public class Category {
 	public BigDecimal getBuyPriceSum() {
 		BigDecimal r = BigDecimal.ZERO;
 		
-		for (Article e : articles) {
-			r = r.add(e.getBuyPrice());
+		for (Article elem : articles) {
+			try {
+				r = r.add(elem.getBuyPrice());
+			}
+			catch(NullPointerException e) {
+				r = r.add(BigDecimal.ZERO);
+			}
 		}
 		
 		return r;
@@ -80,8 +90,13 @@ public class Category {
 	public BigDecimal getSellPriceSum() {
 		BigDecimal r = BigDecimal.ZERO;
 		
-		for(Article e : articles) {
-			r = r.add(e.getSellPrice());
+		for(Article elem : articles) {
+			try {
+				r = r.add(elem.getSellPrice());
+			}
+			catch(NullPointerException e) {
+				r = r.add(BigDecimal.ZERO);
+			}
 		}
 		return r;
 	}
diff --git a/src/com/yourcompany/babydatenbank/model/Pattern.java b/src/com/yourcompany/babydatenbank/model/Pattern.java
index e774e3e..e124e4a 100644
--- a/src/com/yourcompany/babydatenbank/model/Pattern.java
+++ b/src/com/yourcompany/babydatenbank/model/Pattern.java
@@ -57,8 +57,13 @@ public class Pattern {
 	public BigDecimal getOriginalPriceSum() {
 		BigDecimal r = BigDecimal.ZERO;
 				
-		for (Article e : articles) {
-			r = r.add(e.getOriginalPrice());
+		for (Article elem : articles) {
+			try {
+				r = r.add(elem.getOriginalPrice());
+			}
+			catch(NullPointerException e) {
+				r = r.add(BigDecimal.ZERO);
+			}
 		}
 		
 		return r;
@@ -69,8 +74,13 @@ public class Pattern {
 	public BigDecimal getBuyPriceSum() {
 		BigDecimal r = BigDecimal.ZERO;
 		
-		for (Article e : articles) {
-			r = r.add(e.getBuyPrice());
+		for (Article elem : articles) {
+			try {
+				r = r.add(elem.getBuyPrice());
+			}
+			catch(NullPointerException e) {
+				r = r.add(BigDecimal.ZERO);
+			}
 		}
 		
 		return r;
@@ -81,11 +91,16 @@ public class Pattern {
 	public BigDecimal getSellPriceSum() {
 		BigDecimal r = BigDecimal.ZERO;
 		
-		for(Article e : articles) {
-			r = r.add(e.getSellPrice());
+		for(Article elem : articles) {
+			try {
+				r = r.add(elem.getSellPrice());
+			}
+			catch(NullPointerException e) {
+				r = r.add(BigDecimal.ZERO);
+			}
 		}
+		
 		return r;
 	}
 	
-	
 }