Enrique lives with his grandmother in a building for seniors. earn additional money by commissioning some of your grandmother's neighbors. he charges $ 2 for every 1/4 hour work. it took 2/4 of an hour to go to the store for mr. mcguire, 1 1/4 hours to deliver newspapers to the building manager and 3/4 of an hour to pick up groceries for mrs. schulz. did enrique earn money for a $ 18 dvd? use models to explain your mathematical reasoning.