Using a logical with an older RPG Program

[Adam West <adamster@xxxxxxxxx>]

   HI I have to modify a very old RPG program, circa 1987, heavily cycled...  
                                                                              
   I am concerned how to do some simple logic checks in the program, so would 
   rather take care of as much as possible in a logical. In the example below 
   I really need an OR for those invoice numbers, the groups that the program 
   should only be concerned about. can this work as it is? Without the OR.    
   can there be an OR there somewhere in this logical?                        
                                                                              
                                                                              
                                                                              
   0007.00      A          S DATSHP                    CMP(EQ                 
   0)                                                                         
   0008.00      A          S INVNO                     RANGE('I000000'        
   'I999999')                                                                 
   0009.00      A          S INVNO                     RANGE('N000000'        
   'N999999')