The Bruises and Bumps Company makes and sells skateboards at an average price of $70 each. Over the past year they sold 4,000 skateboards. Its closest competitor, Broken Bones Inc., sells its skateboards at an average price of $65. If the point price elasticity of demand for the skateboards produced by Bruises and Bumps is -2.5, and Bruises and Bumps were to lower their price by 5%, how many skateboards should they expect to sell this year?
a. 4500
b. 6000
c. 4250
d. 3500