30. AA Riser owns machinery for moving and delivering plants to its customers. The recorded cost of the machinery is $38,000. It is estimated that the machinery will be able to move 120,000 plants over its life. The company depreciates the machinery using straight-line depreciation over a useful life of twelve years and an estimated residual value of $2,000. The amount that will be charged annually as depreciation will be: A. $3,167 B. $3,000 C. $3,800 D. $3,600