1.The table shows the relationship for a hypothetical firm between its advertising expenditures and the quantity of its output that it expects it can sell at a fixed price of $12 per unit.

a. In economic terms, why might the relationship between advertising and sales look the way it does?

b. Assume that the marginal costs of producing this product (not including the advertising costs) are a constant $10. How much advertising should this firm be doing? What economic principle are you using to make this decision?

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Advertising Expenditures (Millions) Quantity Sold at P = $12 in Million Units $2.5 20.0 $3.5 24.0 $4.5 26.0 $5.5 26.8 $6.5 27.2