Cross Corporation purchases three assets:

• Machine for $500,000 with useful life of 4 years
• Building for $1,500,000 with useful life of 30 years
• Patent for $250,000 with useful life of 20 years

It sells the machine for $100,000 after three years.

Fill out the following blanks in the table below:

	Machine	Building	Patent
Depreciation or amortization method	Double declining balance; no salvage value	Straight-line; salvage value of $300,000	Amortization (straight-line)
Depreciation or amortization expense in year 1
Net book value at the end of year 3
Gain (or loss) from sale
Accumulated depreciation at the end of year 6