Hadinoto Enterprises Inc.(HEI) purchased equipment for $400,00 on January 1, 20x5.The equipment has a 4 year life and no salvage value.HEI estimates that the equipment will be used to produce the following units of inventory: To maximize profit margin for 20x5, the depreciation method HEI will use is : A.Straight-line B.Units of production. C.Double-declining balance.