Issue with chain and SETLL

["Douglas W. Palme" <dpalme@xxxxxxxxxxx>]

I am in need of some help......

I have a LF that contains the following:

0001.00                 R SALES                     PFILE(IMPILN00) 
0002.00      A            ILNSOLDTO                                 
0003.00      A            ILNINVDATE                                
0004.00      A            ILNSTK                                    
0005.00      A            ILNQTYSHP                                 
0006.00      A            ILNEPRICE                                 
0007.00      A            ILNEUAVCST                                
0008.00      A          K ILNINVDATE                                
0009.00      A          K ILNSOLDTO                                 
0010.00      A          K ILNSTK                                    

What I am trying to accomplish here is display a subfile with stock totals 
for the various sales staff individuals for their respective customers.

At first I had the primary K set to ILNSOLDTO so I could chain the file and 
verify the entered (coming from a DSPF) customer number is / was valid.  
Then I need to do a SETLL for the specific data range they want....

I really need to keep the records grouped by the customer number, then in 
date order and then by stock number, that way I can do a READE until the 
customer number changes and thus EOF display the data and I'm out.

I know I can eval each record for the date but it seems that will only take 
a ton more time....correct? Incorrect? 

Suggestions or ideas would be appreciated.