Answer:
Organic Ice Cream Company, Inc.
Depreciation Schedules:
 a. Straight-line. 
Year         Cost      Depreciation    Accumulated      Net book Value  
                                                         Depreciation
Year 1    $14,000      $3,255             $3,255                $10,745
Year 2   $14,000      $3,255             $6,510                  $7,490
Year 3   $14,000      $3,255             $9,765                 $4,235
Year 4   $14,000      $3,255           $13,020                    $980
b. Units-of-production. 
Year         Cost      Depreciation    Accumulated      Net book Value  
                                                         Depreciation
Year 1    $14,000      $5,208             $5,208                $8,792
Year 2   $14,000      $3,906               $9,114                $4,886
Year 3   $14,000      $2,604              $11,718               $2,282
Year 4   $14,000       $1,302            $13,020                 $980
c. Double-declining-balance.
Year         Cost      Depreciation    Accumulated      Net book Value  
                                                         Depreciation
Year 1    $14,000      $7,000              $7,000                $7,000
Year 2   $14,000      $3,500            $10,500                $3,500
Year 3   $14,000       $1,750            $12,250                 $1,750
Year 4   $14,000         $770            $13,020                   $980
Explanation:
a) Data and Calculations:
Cost of new ice cream production kit = $14,000
Residual value = $980
Depreciable value = $13,020
Estimated useful life = 4 years
Annual depreciation expense under straight-line method = $3,255 ($13,020/4)
Estimated productive life of the machine = 9,300 hours
Units-of-productive hours depreciation method per hour = $1.40 ($13,020/9,300)
Year 1 3,720 hours * $1.40 = $5,208
Year 2 2,790 hours * $1.40 = $3,906
Year 3 1,860 hours * $1.40 = $2,604
Year 4  930 hours* $1.40 = $1,302
Double-declining-balance method:
Depreciation rate = 100/4 * 2 = 50%
Year 1 = $14,000 * 50% = $7,000
Year 2 = $7,000 * 50% = $3,500
Year 3 = $3,500 * 50% = $1,750
Year 4 = $770 ($1,750 - $980)