A company's operating income as a percentage of sales is equal to the ________ minus other expenses as a percentage of sales. (Hint: The correct answer is a ratio)

		gross profit
		marketing ROI
		sales-to-assets ratio
		marketing ROS
		net marketing contribution

Calculate the economic profit generated by a business with a capital cost of 10% for $2 billion of capital invested. Its net marketing contribution is $450 million and its other expenses, including interests and taxes, amount to $200 million.

		$250 million
		$200 million
		$50 million
		$100 million
		$150 million