A sales price unit of measure (U/M) is the U/M entered for the sales price. This is specified per item in 'Item. Connect Alternate U/M' (MMS015).
The sales price U/M for an item can be either fixed or dynamic. This is set in 'Item. Open' (MMS001/H).
Dynamic sales price U/M
A dynamic sales price U/M can be changed for the item either in connection with customer order line entry or when a sales price is defined, for example in a price list.
If *PRI is entered in the 'Sales price U/M' field in 'CO Type. Update Field Selection' (OIS014/J), the sales price U/M is retrieved from the price source when the CO line is created. See Assigning a Sales Price to a Customer Order Line for more details.
Fixed sales price U/M
A fixed sales price U/M cannot be changed from the U/M specified for the item in the item table.