The total payroll amount is $50,000 per week.
Since there are only 5 work days per week (Monday to Friday), therefore the employees wage per day is:
Employees wage per day = $50,000 / 5 = $10,000
For the payday on April 4, the wages expense covered for this would be from April 1 to April 4 since the accounting period ended on March 31. Therefore wages expense in the journal entry would be calculated using 4 days.
Wages expense for April for the payday April 4 = Employees wage per day * Number of days
Wages expense for April for the payday April 4 = $10,000 * 4
Wages expense for April for the payday April 4 = $40,000