A company used straight-line depreciation for an item of equipment that cost $15,000, had a salvage val'se of $3,000 and a six-year useful life. After depreciating the asset for four complete years, the salvage value was reduced to $1,000 but its total useful life remained the same. Determine the amount of depreciation to be charged against the equipment during each of the remaining years of its useful life: $1,000 $3,000. $2,500. $2,000. $7,000