PARIS: Regional planemaker ATR, an Airbus and Finmeccanica joint venture, said on Monday it had won 46 firm orders and 35 options at the Paris air show, in deals worth a total of $1.98 billion. Japan Air Commuter, part of Japan Airlines, signed a firm order for eight ATR42-600s, plus one option and 14 purchase rights, valued at $496 million, the companies said. 'We are estimating demand for about 2,500 turboprops in the coming 20 years,' ATR Chief Executive Patrick de Castelbajac said in a statement.