To handle csv format, parsed header and data separately and rejoined using field info and dynamic rename to create dataset. Included a Boolean test on > 4-hour shifts and aggregated by count of results into the view. The dataset does not include days the store is not open (no employee was paid). To count these days in non-working days, find employee's first shift date (assumes the employee's first shift is first date of employment) and join to view. Datetime delta of start date to EOM less total shifts taken is non-working days.