diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
index ce1f56e..ab96d88 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
@@ -11,7 +11,7 @@ import java.util.Scanner;
 public class Axel {
 
 	public static void main(String[] args) throws FileNotFoundException {
-		Spreadsheet spr = new Spreadsheet(10,10);
+		Spreadsheet spr = new Spreadsheet(20,10);
 		String cell, in;
 		Scanner kb = new Scanner(System.in);
 		
diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
index f83c5f5..f650f37 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
@@ -68,7 +68,10 @@ public class Spreadsheet {
 	}
 
 	private int getRow(String cellName) {
-		return cellName.charAt(1) - '1';
+		if(cellName.length()==3)
+			return Integer.parseInt((cellName.charAt(1)+"")+(cellName.charAt(2)+""))-1;
+		else
+			return cellName.charAt(1) - '1';
 	}
 
 	// -----
@@ -121,7 +124,13 @@ public class Spreadsheet {
 		String result = "";
 
 		if (formula.startsWith("SUMME("))  // e.g. SUMME(A3:A8)
-			result = "" + sum(formula.substring(6, 8), formula.substring(9, 11));  // TODO adapt to cells with two digits
+			if(formula.length()==14) 
+				result = "" + sum(formula.substring(6, 9), formula.substring(10, 13));
+			else if(formula.length()==13) 
+				result = "" + sum(formula.substring(6, 8), formula.substring(9, 12));
+			else 
+				result = "" + sum(formula.substring(6, 8), formula.substring(9, 11));
+		
 		else if (formula.startsWith("PRODUKT("))  // e.g. PRODUKT(A3:B9)
 			result = "TODO"; // TODO
 		else if (formula.startsWith("MITTELWERT("))  // e.g. MITTELWERT(A3:A5)
@@ -151,9 +160,19 @@ public class Spreadsheet {
 	 */
 	private long sum(String startCellName, String endCellName) {
 		int sum=0;
+		int startCellRow;
+		int endCellRow;
+		if(startCellName.length()==3)
+			startCellRow=Integer.parseInt((startCellName.charAt(1)+"")+(startCellName.charAt(2)+""))-1;
+		else
+			startCellRow=startCellName.charAt(1)-'1';
+		if(endCellName.length()==3)
+			endCellRow=Integer.parseInt((endCellName.charAt(1)+"")+(endCellName.charAt(2)+""))-1;
+		else
+			endCellRow=endCellName.charAt(1)-'1';
 		for(int i=startCellName.charAt(0)-'A'; i<=endCellName.charAt(0)-'A'; i++) {
-			for(int j=startCellName.charAt(1)-'1'; j<=endCellName.charAt(1)-'1'; j++) {
-				if(cells[i][j].isEmpty()) {
+			for(int j=startCellRow; j<=endCellRow; j++) {
+				if(cells[j][i].isEmpty()) {
 					continue;
 				}
 				sum+=Integer.parseInt(cells[j][i].getValue());