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.