An item of plant is acquired at a direct cost of $110 000. It requires installation and modifications amounting to $20 000 and $10 000, respectively, before it is efficiently operational. It is expected to have a useful life of six years, at which point it will have a residual value of $15 000. REQUIRED Provide the depreciation entries for the first two years using: (a) the sum-of-digits method (b) the declining-balance method (c) the straight-line method.