Andrew paid $30 to buy a potato cannon, a cylinder that shoots potatoes hundreds of feet. he was willing to pay $45. when andrew’s friend javier learns that andrew bought a potato cannon, he asks andrew if he will sell it for $60, and andrew agrees. javier is thrilled, because he would have paid andrew up to $80 for the cannon. andrew is also delighted. what is andrew's original consumer surplus? a. $15b. $20c. $30d. $50

Brian has just finished college. he wants to set up a small business to make and sell fireworks. he registers his company and acquires a license from the government. he finds that most of his competitors are selling fireworks at an extremely low price. he would like to make more money, so he decides to innovate and develop better fireworks. he sells his fireworks at a higher price, and they are a huge hit with the customers. after a few years, he earns enough profit to set up a bigger fireworks factory that complies with the government’s health and safety regulations. he even starts exporting fireworks overseas. which type of economy does this scenario describe?