diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
index 3ce5e51..ce1f56e 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
@@ -15,12 +15,12 @@ public class Axel {
 		String cell, in;
 		Scanner kb = new Scanner(System.in);
 		
-		spr.put("A3", "3");
-		spr.put("A2", "1");
+		//spr.put("A3", "3");
+		//spr.put("A2", "1");
 		
-		spr.put("B9", "=41+A2");
-		spr.put("J5", "=7*6");
-		spr.put("J6", "=3/2");
+		//spr.put("B9", "=41+A2");
+		//spr.put("J5", "=7*6");
+		//spr.put("J6", "=3/2");
 		
 		while(true) {
 			System.out.println(spr);
diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
index 4333146..f83c5f5 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
@@ -150,9 +150,16 @@ public class Spreadsheet {
 	 * @return The sum calculated.
 	 */
 	private long sum(String startCellName, String endCellName) {
-		// TODO implement
-
-		return 0;
+		int sum=0;
+		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()) {
+					continue;
+				}
+				sum+=Integer.parseInt(cells[j][i].getValue());
+			}
+		}
+		return sum;
 	}
 
 	/**