You should be able to do this by defining an Erp Editor Model for that column (although, I would think this would be automatic, since it’s defined in the data view… )
In the grid properties, under Data > Grid Model > Columns, select the BaseUnitPrice column, then Erp Editor to Number and enter the Erp Editor Model menu
Then under Advanced, you can enter the same mask as is in the data view for that column: