Answer:
Raw materials used during the year 3,693 MILLONS
Explanation:
From the intentory Identity we can solve for used raw materials
[tex]$Beginning Inventory + Purchase = Ending Inventory + USED[/tex]
We post the know values, and solve for the unknow values:
[tex]902 + 3,646 = 855 + USED\\902 + 3646 - 855 = 3,693[/tex]
Raw materials used during the year 3,693 MILLONS
Notice: This identity can be use anytime you have partial information about inventory to get the missing data.