## Lower price in restaurant, Macroeconomics

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A restaurant/bar is analyzing its pricing of beer. It has determined that the price elasticity of demand for beer is 0.8, the cross-price elasticity for wine with respect to the price of beer is 0.9, the cross-price elasticity for appetizers is -1.4 and the cross-price elasticity for entrees is -2.2. The current average price of a beer at this bar is \$4.50 and the restaurant sells 250 pints of beer a night. The price of wine averages \$8 a glass and in a typical night 40 glasses of wine are purchased. An appetizer is priced at an average price of \$6 and an entree costs \$12 on average. The average number of appetizers and entrees sold per night is 70 and 25, respectively. The marginal cost of a pint of beer is \$2, an additional glass of wine sold increases costs by \$5, an appetizer increases costs by \$4 and an entree has a marginal cost of \$7. The restaurant is considering lowering the price of beer to \$4.
1. What is the restaurant's profit (prior to the price change)?

2. Using the midpoint formula at the bottom of page 64, by what percent would the price of beer change? Using the price elasticity of demand and the approximation for the change in quantity on page 67, how many pints of beer would the restaurant sell after the price change?

3. Using the price change of beer and the cross-price elasticities, how many glasses of wine, appetizers, and entrees would the restaurant sell after the price change of beer?

4. What would the profit of the restaurant be after the price change?

5. Should the restaurant lower the price of beer to \$4 based on your analysis?

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