Two stores sell CDs in packages, as shown in the table below.
Number of CDs in Package
Cost
CD Prices at Store A
1
$0.70
45
12
$8.40
20
?
$31.50
Number of CDs in Package
Cost
CD Prices at Store B
1
$0.60
20
30
$18.00
65
$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.