How to setup repricing in order management?

Hi Team,

We sell our products to our subsidaries and we don't know the exact price for next month as sometimes these people raise next month sales orders this month.

So can this be achieved using repricing functionality where in when we assign the work flow as "Line Flow - Generic, with Repricing at Fulfillment" in the order type

I tried doing the same but the orders are getting closed automatically without getting into fulfilment.

Please let me know wht could be wrong.

Regards