Display quantity in other units on PURC, SALE, and ITEM

Five new derived fields have been created on PURC, SALE, and ITEM to display the quantity in other units.

- Area

- Cost

- Gross weight

- Net weight

- Volume

These are the new derived fields on external demands:

- RSAARE - Area

- RSACOS - Cost

- RSAGWT - Gross weight

- RSANWT - Net weight

- RSAVOL - Volume

These are the new derived fields on external supply:

- RPUARE - Area

- RPUCOS - Cost

- RPUGWT - Gross weight

- RPUNWT - Net weight

- RPUVOL - Volume

These are the new derived fields on item:

- RITARE - Area

- RITCOS - Cost

- RITGWT - Gross weight

- RITNWT - Net weight

- RITVOL - Volume