U.S. supermajors ExxonMobil and Chevron, Indonesia’s state energy firm Pertamina, and other companies from the two countries are expected to sign later on Monday a memorandum of understanding for commodity purchases by Indonesia for a massive $34 billion, an Indonesian official told Reuters. Apart from energy deals and investments, the memorandum will include Indonesian pledges to buy U.S. soybeans, corn, and cotton, Pujo Setio, a senior official at Indonesia’s Ministry for Economic Affairs, told Reuters. ExxonMobil, which has more…