An XBOX 360 regularly sells for $399. It is on sale for 20% off. What is the sale price of the XBOX?
A. $319.20
B. $78.80
C. $391.02
D. $300.00
The sale price of the XBOX is $399 - 20% of $399 = $399 - 0.20*$399 = $399 - $79.80 = $319.20
Therefore, the sale price of the XBOX is $319.20.
The correct option is A. $319.20.