Bear in mind the true cost per hour is the cost of the hours paid in relation to the hours worked.
So taking billythefish's example above 40 hours per week at €480 + ER PR = €531.60
You pay that for 52 weeks = €27,643.20.
However the employee has 4 weeks holidays paid and 9 statutory public holidays so thats almost 6 weeks per year paid but not worked.
So €27,643.20 / 46wks worked / 40 hours p.w. worked = €15.02 cost for every hour the employee actually works.
Anyone looking at a service where the employee wage is part of the cost charged out needs to bear this in mind, say a maintenance person with an employee charging €xx / hr for labour. I've found a few people in that situation underpricing their charge out rate.