A common brand of cough syrup comes in a 4-fluid ounce bottle. The active ingredient in the cough syrup is dextromethorphan. For an adult, the standard dose is 2 teaspoons, and a single
dose contains 20.0 mg of dextromethorphan. Using the relationships, 1 fluid Ounce = 29.6 mL and
1 teaspoon = 5.0 mL, determine how many grams of dextromethorphan are contained in the
bottle.