Does this plugin work in a multi-currency environment?
The plugin is compatible with Aelia Currency Switcher plugin. This lets you see the cost of your goods correctly updated based on the selected currency.
How does it work with coupon codes?
Whenever you apply a coupon code to the total cost, it will apply to the total price, without changing the product cost. So, for example, if your product price is $100 and the cost is $30, the margin is $70.
If you apply a 50% coupon code, the final price is $50, but the cost remains unchanged ($30), so the margin is $20.