A 14 oz box of candy will contain 84 grams of fat.
Step-by-step explanation
A 3.5 oz box of candy contains 21 g of fat.
Lets assume, a 14 oz box of candy will contain
grams of fat.
Now using the ratio of 'weight of the box' to the 'grams of fat' , we will get.....

So, a 14 oz box of candy will contain 84 grams of fat.