Energy and Demand Charges on Commercial Electric Bills

Hello Everyone! As a sales rep for a renewable energy developer, I am curios to see what business owners on this site would know about their electric bills (Besides that the bill is expensive). A commercial bill is different from a residential electric bill because commercial/industrial bills have a DEMAND charge. This represents the amount of energy that a customer can use an any given time, like enough energy to power up numerous large machines. I am curious to see how much of your electric bill represents energy usage (in kWhs) versus demand (in kW). Thanks Pat