Changing it to:
SELECT BufferMgmt.BufferMgmtID, BufferMgmt.DateEntered, BufferMgmt.GLLink, GLInfo.AMArea, BufferMgmt.Shift, ZoneProcesstbl.Process, [FirstBreak]+[LunchBreak]+[SecondBreak]+[PostShift] AS TotalTime
FROM (BufferMgmt INNER JOIN ZoneProcesstbl ON BufferMgmt.ProcessID =...