Two stores sell CDs in packages, as shown in the table below. CD Prices at Store A Number of CDs in Package 1 12 20 45 Cost $0.70 $8.40 ? $31.50 CD Prices at Store B Number of CDs in Package 1 20 30 65 Cost $0.60 ? $18.00 $39.00 If the rate at each store is constant, which statement correctly compares the cost of a package containing 20 CDs? The cost at Store A is $2.00 greater than at Store B. The cost at Store B is $2.00 greater than at Store A. The cost at Store A is $1.00 greater than at Store B. The cost at Store B is $1.00 greater than at Store