Asset	Cost	Salvage Value	Useful Life	Depreciation Method	Accum Depn (thru 12/31/09)
Land	$150,000	N/A	N/A	N/A	N/A
Office Equipment	$65,625	$5,000	6 years	Straight-line	$ 15,156
Building	$300,000	$100,000	25 years	Straight-line	$12,000
Machinery Equipment	$225,000	$20,000	140,000 units	Units-of-production	$ 39,858
Computer Equipment	$ 9,375	$500	3 years	Straight-line	$ 4,437

Journalize each transaction listed below.

1. January 1, 2015, Tulsa determines the estimated remaining useful life for the machinery is 135,000 cell phones and that the salvage value should be $10,000. Round per unit cost to two decimal places.
2. March 30, 2015, Tulsa purchases new computer equipment for $15,000 cash. The new computer is expected to have a useful life of 5 years and no salvage value. Round annual depreciation to a whole number.
3. March 31, 2015, Tulsa sells its old computer equipment for $5,000 cash.
4. December 31, 2015, Tulsa records its annual depreciation for its fixed assets. (Tulsa manufactures 16,750 cell phones during 2010).