Answer:
$28,287
Step-by-step explanation:
The accumulated depreciation is the total depreciation from the date the asset became available for use to present.
Using the units of production, the accumulated depreciation is a proportion of the depreciable value of the asset assigned based on the ratio of the total units produced to the total units to be produced.
The depreciable value of the asset is the difference between the cost and the salvage value of the asset
= $108,400 - $18,600
= $89,800
Total units produced as at end of 2012
= 9,000 + 10,500 +12,000
= 31,500
Hence the balance of accumulated depreciation at year-end 2012
= 31,500/100,000 * $89,800
= $28,287