324 word improvement

324 Edit : Time is an important component of energy resource transactions. Each product is continuously re-defined by the passage of time. As the product is re-defined it may also be re-priced.
To:
Time is an important component of energy product transactions. A product produced in one interval of time may have to be stored or may not be able to be stored for a later interval of time. Thus the same product in different intervals of time may have difference prices.