Answer:
Tammy's dad works 131 hours more compared to Louie's mom out of a possible 4380 hours.
Explanation:
A half years is:

182.5 days and we can convert to hours by multiply by 24 hours per day:

4380 hours in a half year:
Tammy's dad works 618 hours of 4380 hours and Louie's mom works 487 hours of 4380 hours.
Comparison sentence:
Tammy's dad works 131 hours more compared to Louie's mom out of a possible 4380 hours.