Adding Quantity to MRP Historical Demand Calculation

We have store locations that are not yet on NetSuite. However they receive merchandise from our DC location which are recorded as transfers from the DC location to the stores in NetSuite. We want to add these transfers to the demand quantities for the DC and have NetSuite include them in the MRP demand calculation. Best would be if we can include these transfers but I don't think that's an option.

We are using the historical demand calculation option. I understand that we can create dummy SOs for each period (month in our case) and list the transfers as if they were sales orders which we are using for our historical demand calculation. However, I'm trying to avoid having all these dummy sales orders. Is there any other way we can add monthly quantity on the demand side so that MRP can include them in the demand calculation?