Although MassHealth’s calculation was correct using the life expectancy table that it did, it was incorrect to ignore the appellant’s life expectancy table from Aviva; MassHealth was presented with a copy of the Aviva table and, without sufficient justification, refused to apply it; this is not acceptable, as a life expectancy table from an annuity company cannot be disregarded for the sole reason that it affords a better outcome for a client; rather it must be afforded “due weight.”