Use the midpoint method for calculating all elasticity measures below.

1. Suppose the price of laundry detergent increases from $7 to $9 per bottle. If the quantity demanded decreases from 10,500 cases to 9,500 cases, calculate the price elasticity of demand. Is the demand elastic? Why or why not?

Now suppose it is only one brand of laundry detergent that increases from $7 to $9 per bottle. The quantity of that brand demanded drops from 2,500 to 1,500 cases. Calculate the elasticity of demand for this laundry detergent specifically. Explain the difference between one brand's elasticity of demand and the elasticity of demand for laundry detergent in general.

1. Suppose that the price of apples increases by 10%. Within a short amount of time, apple producers are able to increase the quantity of apples supplied by 2%. The higher price has made it worthwhile to use extra labor to reduce waste and spoilage. Is this short run adjustment showing elastic or inelastic supply? Explain.

Now assume that over a 10 year period of time the overall quantity of apples has grown from 11,000 pounds to 13,000 pounds. Now recalculate the price elasticity of supply for this longer period of time and explain the difference between elasticity of supply in the short run and in the long run.