An item number is linked to only one unit of measurement schedule, which in turn consists of multiple unit of measurements.
Suppose you create the following unit of measurement schedule (X);
- Base UOM: Piece
| UOM | Quantity | Equivalent |
| CASE | 12 | BOX |
| BOX | 10 | SET |
| CASE | 120 | SET |
| SET | 3 | PIECE |
| BOX | 30 | PIECE |
| CASE | 360 | PIECE |
| PIECE | 1 | PIECE |
From the Item Maintenance window, you link an item to the (X) unit of measurement schedule and you could use the item with all these UOM's (Case, Box, Set and Piece)
Accordingly, you could create one price list that is linked to the item which in turn consists of several price levels for several unit of measurements.