A company used straight-line depreciation for an item of equipment that cost $12,000, had a salvage value of $2,000 and had a five-year useful life. After depreciating the asset for three complete years, the salvage value was reduced to $1,200 and its total useful life was increased from 5 years to 6 years. Determine the amount of depreciation to be charged against the machine during each of the remaining years of its useful life: