I need help in converting the hh:mm:ss to 00:00:00 or getting rid of the hh:mm:

Hello all,

When I run the following query:

 SELECT  
  cashoutid,  
  cashoutidbystore,  
  sum(cashouttot_systemtotal) as systemtotal,  
  SUM(actualtotal) AS actualtotal,  
  netdiffrence,  
  PaymentName,  
  cashout_stopdate<br>
  FROM Details_CashoutsAndTotals   
 WHERE cashouttot_systemtotal <> 0.00 
  and cast(cashout_stopdate as date) =       '02/27/2012'  
 GROUP by cashoutid, cashoutidbystore, 
  netdiffrence, PaymentName,      cashout_stopdate
 

I get this:

Looking at the cashout_stopdate column, you will see that there are actual hrs, minutes, and seconds. I need to know if I can convert these to 00:00:00.000, or remove them somehow to where I only have 2012-02-27 date? I have to get rid of the hh:mm:ss in order for the sums to total correctly. any help would be appreciated.