Year = 2014
Cost= $50 M - $5 M = $45 M
Rate =1.177%
Depreciation= 1.177% * $45 M = $529,650
Year=2015
Cost = $45 M
Rate= 2.564%
Depreciation= $45 M * 2.564% = $1,153,800
Year = 2016
Cost = $45 M
Rate =2.564%
Depreciation= $45 M * 2.564% = $1,153,800
Year = 2017
Cost = $45 M
Rate =2.564%
Depreciation= $45 M * 2.564% = $1,153,800
therefore, total depreciation= $1,153,800 + $1,153,800 + $1,153,800 + $529,650 = $3,991,050
Depreciation charges through 2017 = $3,991,050 .