[Apple estimates tariffs will increase costs by $900 million] On Thursday, Apple (AAPL.O) estimated that if global tariffs remain unchanged, costs for the fiscal quarter ending in June will increase by about $900 million. Apple (AAPL.O) CEO Cook said in a financial report conference call that Apple believes the impact of tariffs on the second fiscal quarter is "limited" because the company has shifted its supply chain and inventory. "But for the quarter ending in June (third fiscal quarter), assuming that current global tariff rates, policies and implementations do not change for the rest of the quarter and there are no new tariffs, we estimate that the impact will increase our costs by $900 million," Cook said. In addition, Cook made it clear that the company is using American suppliers. He expressed support for Apple's plan to spend $500 billion over four years, part of which is used to expand teams and facilities in Arizona, Nevada, Iowa, Oregon, North Carolina and other places. "We expect to purchase more than 19 billion chips from more than a dozen states, including tens of thousands of advanced chips produced in Arizona this year," Cook said.