Constant Usage $0.05324/KWH Daytimer (Most usage between 7 a. m. – 7 p. m.)
As long as most power used is 7 a. m. – 7 p. m., then you receive a 20% discount on power usage 7 p. m. – 7 a. m.

$0.05456/KWH NightTimer (Most usage between 7 p. m. – 7 a. m.)
If more than 50% of power usage is outside of 7 p. m. – 7 a. m., then you have to pay the Daytimer rate for all power used 7 a. m. – 7 p. m. $0.05281/KWH

How much would you have paid on the Constant Usage plan?
$22.37
$21.83
$21.65
$22.08