Math Challenge Bonus

Depending upon the reference, Americans eat 43 to 170 pounds of sugar per person per year. When a person eats 100 pounds of sugar and sweeteners each year, how many calories are added to their diets with sugar?

Here is some information to use to answer the question:

Nutritionists usually note that, on the average, 1 gram of carbohydrate yields 4 Calories.

There 28.36 grams of carbohydrates per ounce (dry weight)
16 ounces in one pound