Consider a building with $100,000$ square feet of floor space. It uses $1\mathrm{.}76$ million $kWh$ and $6\mathrm{.}5$ million cubic feet of natural gas in one year. Find the Energy Utilization Index $($EUI$)$ for this facility.

The annual cost for electric energy is $$115,000$ and the annual cost for natural gas is $$32,500.$ Find the Energy Cost Index $($ECI$)$ for this facility