Please present the formula for each problem, and solve

8. A new car dealer wants to give a bonus of $ 2,000 for new cars that sell for $ 25,000. He found that these models have a price elasticity of -.80. They usually lower the price by 9% in these circumstances. The change in the projected number of sales for this car model is expected to drop 10% this quarter. Justify your answer.

a) Can you give the bonus?

b) What would you recommend ?; based on the study carried out.