Padres Co has 500 employees that work an 8-hour day. A new vacation program was started on 1/1/16. The program allows the employee to earn various amounts of vacation days each year that the employee is employeed. Employees are allowed to use their vacation days as soon as they are earned. Any unused days in a year will accumulate indefinitely. The days are paid at the employee's hourly rate in effect at the time the days are taken. The following recaps the vacation program for the years 2016-2018:

YEAR	Hourly Pay Rate for each employee	Vac Days Earned by each employee	Vac Days Used by each employee
2016	$10	5	2
2017	$11	7	4
2018	$14	8	5

** REQUIRED:

1) Determine the amount of the following: a) vacation wage expense FYE 12/31/16. 200,000 b) vacation wage expense FYE 12/31/17. 320,000 c) vacation wage expense FYE 12/31/18. 508,000 d) balance of vacation wage payable at 12/31/18. 492,000 e) total cash paid for vacation days during the three-year period 2016-2018. 536,000

Here are the answers to problem, can you please tell me how they were computed.