How to do an Iterative sum ?

[Midi]

Hello Everyone , I have This DataSet :

User	SPENDING
User_1	50,32$
User_1	250,36$
User_1	322,2$
User_1	222,2$
User_2	30,2$
User_2	563$
User_2	24,23$
User_2	210,32$

And What I Want To Do , is to make an iterative sum for each user  ,i.e: 

like for user_1 i want , for the first line , the first spending , for the second column , i want , to sum of spending between line 1 and line 2 , for the third column , i want the sum of spending in line1 , line2 , line 3 .....ect , like my output would look like this :

User	SPENDING	Total
User_1	50,32$	50,32$
User_1	250,36$	300,68$
User_1	322,2$	622,88$
User_1	222,2$	845,08$
User_2	30,2$	30,2$
User_2	563$	593,2$
User_2	24,23$	617,43$
User_2	210,32$	827,75$

Any suggestions on how to do that , would be much appreciated , thank you.

[PeterClemmensen · Accepted solution]

Do like this

data have;
input User $ SPENDING commax10.;
datalines;
User_1	   50,32$
User_1	  250,36$
User_1	  322,2$
User_1	  222,2$
User_2	   30,2$
User_2	   563$
User_2	  24,23$
User_2	  210,32$
;

data want;
    set have;
    by User;
    if first.User then Total=0;
    Total+SPENDING;
    format SPENDING Total dollar10.2;
run;

Result:

User    SPENDING    Total
User_1	$50.32	    $50.32
User_1	$250.36	    $300.68
User_1	$322.20	    $622.88
User_1	$222.20	    $845.08
User_2	$30.20	    $30.20
User_2	$563.00	    $593.20
User_2	$24.23	    $617.43
User_2	$210.32	    $827.75