Can you walk me through the solution of: Melanie does her weekly shopping at the farmer's market.  She starts with an 8-ounce wheel of brie cheese.  Next is a 1 pound loaf of bread.  She grabs a pound of tomatoes and 2 pounds of zucchini.  After that, she grabs 1 1/2 pounds of chicken breasts and treats herself to 8 ounces of fresh raspberries and 8 ounces of fresh blueberries.  How many pounds of food does she buy?