Phone app: Old gold in exchange

Everything this phone screen can show, in the app’s own words. A “…” is a name, number or date filled in at the time.

• Bill … − old gold … = to pay … — The bill, less the old gold, gives what the customer pays.
• Remove this row — Takes this piece off.
• Enter the gross weight. — Type the full weight of the piece.
• Net … g · value … — The pure weight and its value.