C# basic problem

hi :)

I just started c# and want to try something.

I got like 5 buttons
1 button with 1 dollar
1 button with 2 dollar
1 button with 5 dollar

and if i press the button 1 dollar, i want that the label
says you got 1 dollar, (so far i can do that :))
But if i press the 2 dollar, that the label says,
so far you got 3 dollar (1 dollar + 2 dollar)
and if i press 2 dollar again i get 5 dollar and so on...

Ty :)

Please post your code and use code tags (i.e. [ CODE]your formatted code here[/ CODE]).