diff --git a/Axel/resources/summe.csv b/Axel/resources/summe.csv
new file mode 100644
index 0000000..50d75e1
--- /dev/null
+++ b/Axel/resources/summe.csv
@@ -0,0 +1,10 @@
+=SUMME(C1:E2),,=1,=2,=3,,,,,
+,,=4,=5,=6,,,,,
+,,,,=0,,,,,
+,,,,=0,,,,,
+,,,,,,,,,
+,,,,,,,,,
+,,,,,,,,,
+,,,,,,,,,
+,,,,,,,,,
+,,,,,,,,,
diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
index 065264f..91c295e 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
@@ -155,8 +155,11 @@ public class Spreadsheet {
 		}
 			
 		else if (formula.startsWith("PRODUKT(")) {// e.g. PRODUKT(A3:B9)
+			String[] onlyCells = formula.substring(8, formula.length() - 1).split(":");
 			
-			result = "TODO"; // TODO
+			if(checkIfCellExists(onlyCells[0])&&checkIfCellExists(onlyCells[1])) {
+				result = "" + pro(onlyCells[0], onlyCells[1]);
+			}
 		}
 			
 			
@@ -200,7 +203,7 @@ public class Spreadsheet {
 	private long pro(String startCellName, String endCellName) {
 		int werte[]=getValues(startCellName,endCellName);
 		
-		int produkt=0;
+		int produkt=1;
 		for(int i=0;i<werte.length;i++) {
 			produkt*=werte[i];
 		}
@@ -226,10 +229,12 @@ public class Spreadsheet {
 		int[] werte = new int[(wahreEndZeile - wahreStartZeile + 1) * (wahreEndSpalte - wahreStartSpalte + 1)];
 		
 		int i=0;
-		for(int z=wahreStartZeile;z<=wahreEndZeile;z++) {
-			for(int s=wahreStartSpalte;s<=wahreEndSpalte;s++) {
-				werte[i] = Integer.parseInt(get(z, s));
-				i++;
+		for (int z = wahreStartZeile; z <= wahreEndZeile; z++) {
+			for (int s = wahreStartSpalte; s <= wahreEndSpalte; s++) {
+				if (!get(z, s).isBlank()) {
+		            werte[i] = Integer.parseInt(get(z, s)); // Update the element if it's a number
+		            i++;
+		        }
 			}
 		}