Answer:
$3693 million
Explanation: The materials used in the primary stage of production is called
raw materials. These are the basic materials used for production.
.
Raw material used is the amount of raw materials consumed by the entity
in a specific period , generally a year .
.
Raw materials used = begining invetory + purchased inventory - ending invetory
therefore,
Raw materials used = $902 million + $3646 million - $855 million
= $3693 million