Thurber Co. purchased equipment for					$710,000
which was estimated to have a useful life of		10	years with a salvage value of
$10,000	at the end of that time. Depreciation has been entered for				7
years on a straight-line basis. In 2013, it is determined that the total estimated life should be
15	years with a salvage value of		$4,000	at the end of that time.
Instructions:
(a) Prepare the entry (if any) to correct the prior years' depreciation.