You and your classmates create 25 murals to sell at the PTA auction to raise money for your school. In order to pay for the materials you bought to make the murals, you need to sell each of the murals for $5.25. When transporting the murals to the auction, one of your parents accidentally drops three of the murals in the street and they are run over by a Amtrak train. What is the new minimum price you need to set for the remaining murals in order to pay for the materials?