A grocery shopper needs to buy 5 gallons of milk, 8 cartons of eggs, and 6 loaves of bread. At the first store, the price of a loaf of bread was $1. 50, the price of a gallon of milk was $3. 00, and the price of a carton of eggs was $2. 0. At the second store, the prices of bread, milk, and eggs were $1. 00, $3. 50, and $1. 75, respectively. Which matrix multiplication problem could be used to find the number of dollars the shopper would spend on bread, milk, and eggs at each of the two stores?