There are three convenience stores in Gambier. This week, Store I sold 84 loaves of bread, 48 quarts of milk, 16 jars of peanut butter, and 112 pounds of cold cuts. Store II sold 105 loaves of bread, 72 quarts of milk, 21 jars of peanut butter, and 150 pounds of cold cuts. Store III sold 70 loaves of bread, 30 quarts of milk, no peanut butter, and 50 pounds of cold cuts. Complete parts (a) through (c) below.
(a) Use a 3×4 matrix to express the sales information for the three stores.