QUESTION 29 The subject real estate is improved with a 3.100 sq.ft. It has four central forced air conditioner units in place. The mare standard for this building is only one air condition unit The cost of the four units is $42.000 but one unit would only cost $12,000. These units are 10 years old and have a 4% depreciation per year. What the functional obsolescence from this overimprovement? $14,400 516,400 515.100 $18,000