Depreciation 24-year old bldg. Bldg in average condition. Cost is $3,531,344. Overhead door damaged $9,988 to replace. Roof was replaced 6 years ago and has a 21-year guarantee; the cost to replace it is $202,963. HVAC components should last another 9 years and were installed when the building was built. The cost to replace the HVAC is $66,694. The offices were just redecorated at a cost of $62,932, and will not need redecorating for another 15 years. The life of the long-lived items is 66 years. What is the total depreciated value of the improvements?