Based on:
DECOSm = DECONml * ECOSml + . . . + DECONmi * ECOSmi (Equation 508.1.2)
Where:
DECOS = The annual Design Energy Cost
DECOSm = The monthly Design Energy Cost
DECONmi = The monthly Design Energy Consumption of the ith type of energy
ECOSmi = The monthly Energy Cost per unit of the ith type of energy
The DECONmi shall be calculated from the first day through the last day of the month, inclusive.
10 C.F.R. §434.508