Moclain Company incurred the following expenditures during 2019 : Apr. 9 The air conditioning system in the old manufacturing facility was replaced for $87,500. The old air conditioning system had a cost of $70,500 and a book value of $2,700. The old air conditioning system had no scrap value. June 29 Annual maintenance of $37,750 was performed. Sept. 12 The roof of the old manufacturing facility is replaced at a cost of $64,500. This expenditure substantially extended the life of the facility. Dec. 28 A new wing was added to the manufacturing facility at a cost of $272,000. This expenditure substantially increased the productive capacity of the plant