Swifty A.S. purchased a piece of equipment at the beginning of 2019. The equipment cost 1421, 680 . It has an estimated service life of B years and an expected residual value of 158.800 . The sum-of-the-years-digits method of depreciation is being used. Someone has already correctly prepared a depreciation schedule for this asset. This schedule shows that 150,400 will be depreciated for a particular calendar year. Determine for what particular year the depreciation amount for this asset will be 150.400 . Year of depreciation