USD - Riel exchange rate

Go to Settings → Exchange rate to set the conversion rate between USD and Riel (KHR), used for change calculation and price conversion shown on the sales screen and receipts.

1. The Current rate section shows the rate in effect — if none has ever been set, the system uses a default rate.
2. Enter a New rate (1 USD = ? Riel) and click Update rate. The new rate takes effect immediately for the Sales screen and every order created afterward.
3. The Rate history section lists every previous change along with when it was applied, so you can look up the rate that was in effect at any point in the past.

Update the rate regularly (e.g. daily, or whenever the market rate shifts noticeably) so the Riel change given and the converted prices shown to customers stay accurate.