Lump sum income is a nonrecurrent money payment received by the assistance unit. Lump sum income is calculated as follows: Lump sum income is added to the sum of all other income for the month after work expenses and other disregards, as allowable, have been applied; Income resulting from the computation in §B(1) of this regulation is divided by an amount equal to the allowable payment amount for the assistance unit size as described in Regulation .17 of this chapter; The assistance unit is ineligible for the period of months equal to the quotient; Any amount remaining which is less than a full monthly benefit for the assistance unit size is excluded as income in the first month after the period of ineligibility; and If the lump sum is less than a monthly payment amount for the assistance unit, the lump sum is excluded. Lump Sum Income-Shortened Period of Ineligibility. The local department shall shorten the period of ineligibility for TCA due to receipt of a lump sum when the: Lump sum income becomes unavailable to the assistance unit due to circumstances beyond the assistance unit's control, with the following circumstances being considered beyond the control of the unit: Theft of money; Disaster defined as fire, flood, tornado, or civil disorder; Eviction or foreclosure; Theft or breakdown of an essential appliance; Breakdown of essential household furnishings, equipment, or structure necessitating repair or replacement; or Lack of heating or utilities or insufficient fuel supply; Assistance unit incurs and pays medical expenses; Assistance unit uses the lump sum to repair a vehicle, purchase a vehicle, or pay car insurance; or Lump sum income becomes unavailable to the assistance unit due to circumstances beyond the assistance unit's control as defined by the local department.