Saudi Arabia has agreed to sell 3 million barrels of additional crude oil to India next month to make up for supply cut by Iran over unpaid bills, touching $7 billion. Saudi Aramco, the national oil firm of Saudi Arabia, will supply one million barrels each to Essar Oil, Bharat Petroleum and Hindustan Petroleum in August while Mangalore Refinery, too, is in talks to contract similar volumes, officials said on Tuesday.