Final answer:
Marketing return on sales equals the net marketing contribution divided by sales revenues, multiplied by 100%, hence option A is correct.
Step-by-step explanation:
The question asks to identify which formula correctly represents the marketing return on sales. The correct formula is the net marketing contribution divided by sales revenues, multiplied by 100%. Therefore, answer A is correct: Marketing return on sales equals net marketing contribution/sales x 100%. Total revenue is the income generated from selling products, calculated by Price x Quantity. Accounting profit involves total revenues, subtracting explicit costs like depreciation. In economics, economies of scale occur when the long-run average cost of production decreases as total output increases, pinpointing efficiency in production processes.