[SOLVED] How to change the global variable in a script

I'm trying to change a variable in the "GameValues" script, but always what I call GameValues.value again it returns 0, but WHY???

GameValues script:

Code (CSharp):

1.     private static int gameMoney;
2.     private void Start()
3.     {
4.         gameMoney = 0;
5.     }
6.     public static void setGameMoney(int money)
7.     {
8.         gameMoney = money;
9.     }
10.  
11.     public static int getGameMoney()
12.     {
13.         return gameMoney;
14.     }

ClickTriggerPlus10:

Code (CSharp):

1.     private void OnMouseDown()
2.     {
3.         GameValues.setGameMoney(GameValues.getGameMoney() + 10);
4.     }

ClickTriggerMinus10:

Code (CSharp):

1.     private void OnMouseDown()
2.     {
3.         GameValues.setGameMoney(GameValues.getGameMoney() - 10);
4.     }

I expected the getGameMoney function to return 40 after clicking 4x on the object with the ClickTriggerPlus10 script and 30 after clicking 1x on the ClickTriggerMinus10 script

 

It was just a math error, the correct thing would be to add -10, contrary to what I had done previously

ClickTriggerMinus10:

Code (CSharp):

1.     private void OnMouseDown()
2.     {
3.         GameValues.setGameMoney(GameValues.getGameMoney() + -10);
4.     }