Delivery Service Express (DSE) has a fleet of trucks and specializes in the delivery of refrigerated foods. The warehouse manager purchased a delivery truck for $240,000. Part of the job of the Chief Financial Officer (CFO) is to depreciate the delivery truck over its estimated useful life. The CFO is considering three depreciation methods: activity-based, straight-line, and double-declining-balance. The CFO has plotted depreciation each year (left graph) using an estimated five-year useful life. The right graph shows the accumulation of depreciation each year for each method.