A music store is selling posters and CDs. Each poster gives a profit of $4.00 and each CD gives a profit of 6.25 The store needs to make an average profit of $300 per hour to stay in business. Let x represent the number of posters
sold and y represent the number of CDs sold. Write and graph an inequality showing how many of each item (posters
and CDs) the store needs to sell per hour to make a sufficient profit.