Employees at the Waco Waffle House were paid on Friday, December 27 for the five days ending on December 27. The next payday is Friday, January 3. Employees work 5 days a week. The weekly payroll amounts to $3,800. The appropriate adjusting journal entry on December 31 would be to credit Salaries and Wages Payable for $760. $2,280. $1,520. $3,800.

I know the answer is 1,520, but I'm not sure why and would like to be explained the reason.