Based on this graph,Calculate the consumer surplus from 500 pairs of shoes?

Consider the same apple-juice market. Suppose now, the demand curve a liter of apple-juice is given by: P = 107 - 5QD. i. Calculate the price elasticity of demand of apple-juice when price rises from 55 to 80. Give your answer in two decimal places. After the price rise, the income of a person goes up from 31033 to 46187. The new demand curve is P = 132 - 5QD. ii. Calculate the income elasticity of demand. Give your answer in two decimal places. iii. Due to this increase income, has demand become more or less elastic? More elastic Less elastic Income and demand elasticity are not related Not enough information given   iv. If the increase in income (and the subsequent shift of the demand curve) had occurred before the rise in price, what would the YED be? Give your answer in two decimal places.

Please read attached article and then use it to answer the following questions. Do companies prefer to sell products that are more elastic or more inelastic?  Briefly explain. What does the article describe as the best way to calculate price elasticity, and what other information is relevant to inform marketing efforts? Suppose a marketing company runs a market test and finds that the price elasticity equals -0.6.  Would a company be more inclined to increase or to decrease price given this elasticity?  Explain what would happen to quantity purchased (by how much it would change) and total revenue (would it increase, decrease, or stay the same) if the company were to decrease price by 10%.

A company named The Mad Hatter decides to increase the price of its hats from $26 to $47 per hat. As a result of this change, the quantity demanded of hats drops from 195 to 144 hats. What is the price elasticity of demand for its hats? (Use the midpoint method for your calculations and round your answer to two decimal places.)