Time issue when we output on end of month

Hi Expert,

We run 24 hours everyday except Sunday, Some time our output will use 2 posting date. for example, we have a RPO and its consumption is on 7/31/2014 and output is on 7/31/2014 & 8/1/2014. because this, Accounting department has reconcile issue.

does anybody has some issue and how to solve this ? or can I use inventory period to set the end date on Sunday that day near end of month ? Although per month the Inventory cost are different, but for year will be correct because we start 1/1 and end 12/31 (we off both day).