Apple made a big pledge at a White House event. But the logistics of creating a gadget like the iPhone, and managing its cost, are complex.

Apple commits an additional $100 billion to US manufacturing, raising its total to $600 billion over four years in a bid to ease tariffs and boost local production.

Apple has outlined its plans for the 100 billion dollar investment in both materials and labor sourced in the U.S., including producing 100% of iPhone and Apple Watch displays in Kentucky.