Staggered month end closing for the sub-ledgers / Modules

Hi Expert,

Can we do staggered month end closing for the sub-ledgers e.g. AP module, SD module etc.? Meaning, can we close those modules, and open the following period for users to key-in their transaction without affecting the other sub-ledger for that particular month-end closing.

Also for SD & MM module, is it possible for the sales people to key in the sales order or invoice relating to the following month, if we have not closed those modules yet - would it affect the weighted average cost (WAC) of the inventory for that particular month end closing?