To receive payments from customers on a multinational/international scale, you will usually use more than one currency. Then you may be able to configure the POS to add a new currency, that allows you to record sales in more than one currency. Check out the explanation below for more detailed steps:
I. Create Currency.
Step 1. Go click Setup > Currency > Add.

Step 2. Input Name, Symbol, and Exchange Rate.

*Input Name (Currency Name, example: Euro)
*Symbol (Currency Symbol, example: €)
*Exchange Rate (The rate currency is entered with the primary currency, example €1 equals Rp. 16.700)
Step 3. Currency added successfully.

II. Try to sell items in a different currency.
Step 1. Click the Sell menu, input the product you want to sell, then click note.
Change the currency according to the one that was added earlier. *for example the euro. Later the exchange rate will appear and it can be changed again according to the rate you want to apply. Then click OK.

Step 2. Click the product, then input the quantity and price of the product with the latest currency price, then click OK.

Step 3. Click pay, then the currency will change according to the previously inputted currency. Then click OK.

Step 4. The Bill will display the currency used according to what was entered in the Note menu earlier.

You might also like to read this article:
To create a sales return, you can check the following article: Sales Transaction Return
To prevent sales transactions from occurring even though the goods are out of stock, you can check the following configuration: Prevent overselling
To prevent sales below Unit Cost/Unit Price, you can check this article: Setup the Minimum Sell Price
By using DealPOS, you can manage your stock better and prevent negative inventory. Try the free demo of the DealPOS application for 14 days by clicking the image below: