Mass updation of already existing cost collectors

Dear friends,

We are using back flushing scenario to declare production of almost 1000 SFGs. Our finance people use to do costing for all these part codes on monthly basis, i.e. on the last date of current month for next month. Now the problem we are facing is that they are OK with costing for all these part codes, as it can be done in mass thru CK40N. But it becomes very tidious job to update the cost collector, one-by-one, thru KKF6N. KKF6M is useful only in case, where new cost collector is to be created. But not for to re-update the already existing cost collectors. So it will be of great help if any body can suggest me a way out, where I can feed in all the part codes in one go and update the existing cost collectors for new month.

Thanks in advance....