Iran wants to recover tens of billions of dollars it is owed by India and other buyers of its oil in euros and is billing new crude sales in euros, too, looking to reduce its dependence on the U.S. dollar following last month's sanctions relief. A source at state-owned National Iranian Oil Co (NIOC) told Reuters that Iran will charge in euros for its recently signed oil contracts with firms including French oil and gas major Total, Spanish refiner Cepsa and Litasco, the trading arm of Russia's Lukoil. "In our invoices we mention a clause that buyers of our oil...