Waldum Company purchased packaging equipment on January 5, 2012, for $135,000. The equipment was expected to have a useful life of 3 years, or 18,000 operating hrs, and residual value of $13,500. The equipment was used for 8,600 hrs during 2012,5,300hrs in 2013, and 4,100 hrs in 2014. Determine the amout of depreciation expense for the yrs ended Dec. 31,2012 thru 2014, by straight-line, units-of-output, and double declining balance method.

what method yields the highest depreciation expense in 2012? wht method yields the most depreciation over the 3 yr life of the equipment?