Last Reported Field in Sales Audit

 In the Totals Audit Trail Find Window (Action à Sales Audit à Additional Operations à Audit Trail à Total Audit Trail the system displays the Total Audit Trail Find Window.   If we select the totaling details for a store and date it displays the totals.  One of the columns on this screen is Last Reported. 

Does anyone know what the Last Reported column in the Sales Audit screen indicate?  And how does that value get calculated?  I have only found one document on Oracle Support that references the field.  It indicates the following:  Last Reported:  This is the value that is taken from one of the 4 totals in that order HQ Reported, Store Reported, System Calculated or POS Reported which is not NULL.  If all the 4 totals are NULL, then Last Reported will be NULL also.