Liz earns $9.28 per hour at her part-time job. She works 5.5 hours on Sunday. How much money does Liz make?

To calculate Liz's earnings for the day, we multiply her hourly rate of $9.28 by the number of hours she worked, which is 5.5:

$9.28/hour * 5.5 hours = $51.04. Answer: \boxed{51.04}.