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I just know it.
Weh?!! =p
COST
• There are about 30 tables in the lounge.
• Assuming the janitor consumes 30 seconds to clean a table.
• So that’s about 15 minutes per day
• Or 92 hours per year
• Or 9200 hours in a hundred years
• And an additional cost of 2,737,500 per 1 hundred years.