the level of occupancy in an office varies according to the business in question. in many cases the office is far from fully occupied, which means that the installed ventilation system is oversized, costing both money and energy unnecessarily.

Write the above sentence using proper case.
The level of occupancy in an office varies according to the business in question. In many cases the office is far from fully occupied, which means that the installed ventilation system is oversized, costing both money and energy unnecessarily.