Answer: The refrigerator cost in this month is $4.5 approximately.
Step-by-step explanation:
Since we have given that
Amount of watt of electric power = 320 W
Number of days = 30
Unit cost of electricity = $0.13/Kwh
Hold factor = [tex]\dfrac{1}{4}[/tex]
Number of hours in a month = 24
So, the refrigerator cost in this month would be
[tex]0.13\times 0.32\times \dfrac{1}{4}\times 30\times 24\\\\=\$7.488[/tex]
Hence, the refrigerator cost in this month is $4.5 approximately.