Coolit Company installed a new air conditioning system in their main office on January 1, 2008. The system cost $300,000 and was expected to last 10 years (no Salvage Value). On March 31, 2009, new fluorocarbon emission guidelines led to the replacement of the principal cooling mechanism at a cost of $105,000. The life of the cooling system nor its salvage value was affected but the efficiency was greatly increased. Coolit uses the straight-line method of depreciation. The depreciation expense for the year 2009 was: