have 3 currency fileds, amount a, amount b, amount c.
and a formala with a+b+c, but only saveed, then can see this fields. want to see this field, value change when the changing of amount a, b, c
Master object: PO, field: PO Number, Field: PO Descritpion, Filed: PO Amount
Child object: Invoice, associated with PO with PO Number
when open invoice tab, want to choose PO number, and PO description and PO amount can be display into invoice interface.
not sure if we can do that.
