Answer: 72 Calories
Explanation:
First, calculate the calories per ounce.
216/18= 12
Then, multiply by 6 to get how many calories Sam consumed.
12 * 6= 72
Sam consumed 72 calories.
You can also see that 6 ounces is 1/3 of the bottle, so the answer can also be derived by multiplying 218 by 1/3.