Portions of lot sizes of less than 100 square feet each above the minimum may not be considered in the above calculations. By way of example and not limitation, the formula for a lot containing 4,335 square feet is: 1,800-square-foot maximum habitable floor area, plus (3 x 42) additional square feet, for a total of 1,926 maximum square feet of habitable floor area. The remaining 35 square feet are discarded and shall not be considered in calculating the maximum habitable floor area of the dwelling house.