For a given week, Lena’s coffee house has available 1728 ounces of A grade coffee and 1872 ounces of B grade coffee. These are blended into 1 pound packages as follows: an economy blend that contains 3 ounces of grade A coffee and 9 ounces of B grade coffee, and a superior blend that contains 9 ounces of A grade coffee and 4 ounces of B grade coffee.
