# Issued invoices
# Calculation of origin
**Keywords**: Kalkulacija porekla
#### Components
- **Selling** **price**
- Price of item on order sale (sales order): The price with the included discount is taken per one piece.
- **Material** **costs**
- Concrete serial numbers and the material used on order items are taken - the country of origin of the material and the purchase price per lot are looked at. The latter originates from receiving.
- **Type** **of** **product** **sold**
- The type of product (product or reselling), that is being sold determines, what to perform in process.
- **Company** **country**
- The country, where the company, using the ERP, is located.
- **Margin**
- - Selling price - material costs.
#### Process
If product type is reselling, it is always set 100% from the country of origin, which is set on receipt.
**If it is not reselling, but instead a product**, we calculate as follows:
- 1. We add up the value of the installed material by country.
2. We add up material across the EU and outside the E.
3. If the **margin** **+ material** from the company's country is greater than the largest other country, the company's country (Slovenia) is taken.
4. If not, the country with the largest amount is taken.
5. If the total non-EU added-up amount is greater than 50% of the sales price (adjusted according to the EU-South Korea agreement), there is no preferential origin.