How many calories are in this serving of nuts?

Question

The calorie count of a serving of food can be computed based on its composition of carbohydrate, fat, and protein. The calorie count C for a serving of food can be computed using the formula C=4h+9f+4p, Where h is the number of grams of carbohydrate contained in the serving, f is the number of grams of fat contained in the serving, and p is the number of grams of protein contained in the serving. A serving of a certain type of nuts contains 13 grams of fat, 6 grams of carbohydrate, and 5 grams of protein. 

Answer 1

(9)(13) + (6)(4) + (5)(4) = 161