When a corporation uses - sum of the years digits method - for its fixed assets depreciation:

The sum of years digits formula for depreciation is n(n+1)/2, where n stands for useful life of years. Here as the useful life is10 years, the formula is10(10+1)/2 =55

For the1st year the depreciation will be100,000*10/55=  $18,182

For the2nd year the depreciation will be100,000*9/55=   $16,364

For the3rd year the depreciation will be100,000*8/55=    $14,545

The Depreciation is10000$ for eash year since it should be depreciated over a period of life.

 the answer

=100000(10/55)=18182 for the1st year 

=100000(9/55)=16364for the2nd year 

=100000(8/55)=14545for the3rd year 

total =49090.91$

First year                      = $18,181.82

Second year                 = $16,363.64

Third year                     = $14,545.45

Total Depn. Expenses = $49,090.91