after the exam is finished but sometimes its cleaned after the end of all the exams
yes
They where my slaves they cleaned rooms, toilets, and condoms
There are no special health and safety arrangements for school rooms in which students take examinations.
A hamster cage should be cleaned weekly.
Take the dog to the vet for a dental exam. He probably needs his teeth cleaned.
It has to be cleaned every so often, mainly if you can see that it is dirty than you should clean it. And it really should be cleaned every 4-5 weeks.
The best way to teach children how to tidy up in their rooms is to deny them something they really want until they have cleaned up in their own bedrooms.
A horses stall should be cleaned every day.
It must be cleaned daily.
To get an accurate average, you'll need to track your time and cleaning supply usage over a relatively long period of time (a few months perhaps). If you sum the total amount of time spent cleaning rooms and the total value of cleaning supplies used to clean the rooms then divide each of those numbers by the total number of rooms cleaned, you'll have your answer. Track for a shorter time period (less total rooms cleaned) for a quicker, but possibly less accurate answer. This assumes you want to know hard costs only, it does not factor in things such as your vehicle operation costs to get to and from the rooms to be cleaned, insurance or employee boding costs, employee benefit/tax costs, etc.
Rates are usually based on the size of the rooms being cleaned. Right now there is a special rate of $33 per room if you do four or more rooms at the same time.
This trim kit is fairly resistant to average scuff marks and should not have to be cleaned exceedingly often.