Something like this...  data gotcha;                                        format start_time end_time time_elapsed time5.;    infile datalines4;                                input @1 start_time time5. @7 end_time time5.;    time_elapsed = end_time - start_time;             datalines4;                                    02:20 02:45                                       03:00 03:45                                       04:02 04:17                                       ;;;;                                              run;                                            ... View more