Energy Content for a Food Using Nutrition Facts

> The Nutrition Facts label for crackers states that 1 serving contains 19 g of carbohydrate, 4 g of fat, and 2 g of protein. What is the energy from each food type and the total energy, in kilocalories, for one serving of crackers? Round off the kilocalories for each food type to the tens place.

> Using the nutrition values for one serving of crackers, calculate the energy, in kilojoules, for each food type. Round off the kilojoules for each food type to the tens place.

What is the total energy, in kilojoules, for one serving of crackers?