Greene Company purchased a machine for $75,000 that was expected to last 6 years and to have a salvage value of $6,000. At the beginning of the machine's fourth year the company decided that the estimated useful life should be revised to a total of 10 years instead of 6 years and the salvage value revised to be $5,500. Straight-line depreciation was used throughout the machine's life. Calculate the depreciation expense for the fourth year of the machine's useful life.

The stock of grommet corporation, a u.s. company, is publicly traded, with no single shareholder owning more than 5 percent of its outstanding stock. grommet owns 95 percent of the outstanding stock of staple inc., also a u.s. company. staple owns 100 percent of the outstanding stock of clip corporation, a canadian company. grommet and clip each own 50 percent of the outstanding stock of fastener inc., a u.s. company. grommet and staple each own 50 percent of the outstanding stock of binder corporation, a u.s. company. which of these corporations form an affiliated group eligible to file a consolidated tax return?