FREE-RESPONSE QUESTIONS of sunglasses? 1. Many factors can affect the equilibrium price and quantity of a product. Lightnings and Stealthys are two brands of running shoes, and each has a price of $80. How would the supply or demand and the price and quantity for Stealthys change given each scenario? (a) The price of rubber used in the sole of the two running shoes increased. iscover (b) The federal government offers a subsidy for companies who make fitness equipment and clothing. (c) An Italian company comes out with a running shoe that is superior to and less expensive than the current popular US running shoe. (d) The price of Lightnings increases to $100. (e) Researchers publish findings showing that running is good for your heart