So many factors… In some cases it can be as simple as a lower demand driving prices down. It could be tarrifs, trade agreements, corporate taxes, etc. In some countries the cost of doing business is just higher due to regulations and legal procedures, etc.
Different countries have different social entitlements such as maternity leave, health care, retirement pensions. You can’t just look at the price alone. You have to look at the entire economic picture.
Bottom line is that things cost different amounts in different areas for different reasons. Look at cable TV and internet service. Prices can vary quite a lot between areas only a few miles apart.