Section 407-430-7 - COMPUTATION OF COST OF GAS ADJUSTMENTA. The cost of gas adjustment for any period is equal to the projected cost of gas for that period, plus or minus the reconciliation adjustment, plus or minus the interest expense adjustment, minus the base rate gas cost recovery.B. A gas utility shall estimate the total therm sales for each month of the period during which its proposed cost of gas adjustment is intended to be in effect.C. The cost of gas adjustment rate for any period is equal to the cost of gas adjustment divided by the projected total therm sales for that period.D. The cost of gas adjustment rate shall be a single uniform rate per therm for all customers of the gas company.65- 407 C.M.R. ch. 430, § 7