I didn't think of looking at the sql view. Here it is:
SELECT Contacts.FirstName, Contacts.LastName, Leave.Type, Contacts.File_Number, Leave.Hours, Leave.DateUsed, Contacts.PRCode, TimePeriods.PayPeriod, Leave.DateUsed, Leave.Ending, [Contacts]![LastName].Nz([Leave]![Hours],0) AS Expr1
FROM...