Answer:
Depreciation expense year 1: $ 542.86
Book value at the end of year 1: 3,557.14
Step-by-step explanation:
1) Depreciation = [purchase price - residual value] / [useful life]
2) Depreciation = [$ 4100 - $ 300] / [7 years] = $ 542.86 / year
That is the depreciation expense after year 1.
3) The book value will be the purchasing value less the depreciation accumulated, which is that of one year: $ 4100 - $ 542.86 = $ 3,557.14