4. At a university, which does not qualify as a tax-exempt entity under federal and state laws, each year, without taxes, it costs an average of $56,000 with a variance of 81 million dollars to repair and maintain all the dormitories. If all items associated with the maintenance and repair of the dormitories are subject to 8.875 percent tax, find the standard deviation of the total cost of maintaining and repairing the dormitories, in a random year, after all the taxes are paid.