1. (3 points) On a given year, a real estate company sells 20 penthouses for 2.5 million dollars each and 6 luxury homes for 7.5 million dollars each. At the end of year meeting, a savy agent made the following observation: "for each $100,000 decrease in the price of a penthouse and for each $450,000 decrease in the price of a luxury house, we will sell four more penthouses and two more luxury homes each year." Use this information to suggest the listing price for the properties in the upcoming year that will maximize the revenue