Cullumber Ltd. purchased a delivery truck on January 1, 2021, at a cost of $74,160. The truck is expected to have a residual value of $7.910 at the end of its 4-year useful life. Cullumber has a December 31 year end. Use the diminishing balance method and assume the depreciation rate is equal to double the straight-line rate. Calculate the depreciation in total over the truck's life. Total depreciation expense $