Mass Upload/Update feature on Manage Item Groups for Revenue Management

Summary:

can we do Mass Upload or Mass Update to change the end date in the Manage Item Groups for Revenue Management screen. we dont see any such options on the screen. we have new items created in Oracle and exported to RMCS on daily basis but there is no automated way to add the items to the Item Groups. Also every quarter we need to end date items from the profile which are needed to be added to the Unit SSP profile. end dating each item from the screen manually takes lots of time. how to achieve this automated?