Question 13.
The estimated monthly cost of an energy-efficient refrigerator is $57, meaning the yearly cost is
[tex]57\cdot12=\$684[/tex]
Question 14.
The least energy-efficient refrigerator costs $72 per month, meaning the annual cost is
[tex]\$72\cdot12=\$864[/tex]
Therefore, the amount you will save on an energy-efficient refrigerator be
[tex]\$864-\$684=\$180[/tex]
Hence, the amount saved on an energy-efficient refrigerator will be $180.
