A wheat manufacturer has a contribution margin of 85%. Recently, to deter over farming, the government has decided to put a 27% tax on the sale of wheat products. But people love their carbs, and therefore the price elasticity of demand for wheat is low at .40. What is the expected percentage change in sales from this new tax? The answer is Sales decrease by 22.95%
Can you show me how to get that answer!

Jennifer purchased a house in a brand new development in the outskirts of town. when her house was built, the nearest fire department was nearly 20 miles away. as her neighborhood developed, the density of the community called for a new fire department 1.5 miles away. what effect will the new fire station have on her homeowners insurance premium? a. a new fire department will be more demanding on local taxes. her annual premium will go up. b. the location of a fire department has no bearing on the value of her house. her annual premium will stay the same. c. the new fire department will reduce the risk of financial loss in her home. her annual premium should decrease. d. with a fire department so close (less than 5 miles), financial risk on jennifer’s home practically disappears. she will not need to pay insurance anymore.