Question

An industrial coal-fired boiler for process steam is equipped with a 10-year-old electrostatic precipitator (ESP). Changes in
GDS Recovery Rates (r) Year 7-year Property Class 1 0.1429 0.2449 0.1749 4 0.1249 0.0893 0.0892 0.0893 0.0446 23 56 7 CO
Discrete Compounding; i- 7% Uniform Series Single Payment Compound Capital Recovery Sinking Fund Compound Amount Factor To Fi
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Answer #1

For calculating present worth value of capital investment , we need to calculate tax saving on both deprectiaon and operating expenses on asset

Tax saving = Expense * depreciation rate

Present value of tax saving = tax saving * PVF (7%)

So i am providing the following table containg calculation of above then at final stage we need to deduct this present value of tax savings from price of capital asset and also add After tax sale value of sset at end of life

NEW BAGHOUSE

Year MACR (A) Price(B) Depreciation(A*B) Tax rate Tax saving on deprection PVF(7%) P.V. of tax asaving on dep.
1 0.1429 1133500             1,61,977.15 0.22                          35,634.97                     0.9346                               33,304.45
2 0.2449 1133500             2,77,594.15 0.22                          61,070.71                     0.8734                               53,339.16
3 0.1749 1133500             1,98,249.15 0.22                          43,614.81                     0.8163                               35,602.77
4 0.1249 1133500             1,41,574.15 0.22                          31,146.31                     0.7629                               23,761.52
5 0.0893 1133500             1,01,221.55 0.22                          22,268.74                     0.7130                               15,877.61
6 0.0892 1133500             1,01,108.20 0.22                          22,243.80                     0.6663                               14,821.05
7 0.0893 1133500             1,01,221.55 0.22                          22,268.74                     0.6227                               13,866.75
         10,82,945.90 Total                           1,90,573.30

Present worth or value of new baghouse = cost of asset - present value of tax saving on depreciation - present value of tax saving on operating expense + present value of net cash inflow at end of life from sale of asset

Present value of tax saving on operating expense = annual operating expense * depreciation rate *PVAF(7%,10 years) = 122,500 * 0.22 * 7.0236 = $189286.02

sale value of asset at end of life = 0.1424*1133500 = 161410.4

and book value = cost - total depreciation = 1133500-1082945.90 =50554.1

profit on sale = 161410.4-50554.1 = 110856.30

tax on profit = 110856.3* 0.22 = 24388.39

net cash flow from sale = 161410.4 - 24388.39 = $137022.01 and its presnent value = 137022.01 * 0.5083 = 69655.04

Present worth or value of new baghouse = 1133500 - 190573.3 - 189286.02 + 69655.04 = $8,23,295.72

NEW ESP

Year MACR (A) Price(B) Depreciation(A*B) Tax rate Tax saving on deprection PVF(7%) P.V. of tax asaving on dep.
1 0.1429 987000             1,41,042.30 0.22                          31,029.31                     0.9346                               28,999.99
2 0.2449 987000             2,41,716.30 0.22                          53,177.59                     0.8734                               46,445.30
3 0.1749 987000             1,72,626.30 0.22                          37,977.79                     0.8163                               31,001.27
4 0.1249 987000             1,23,276.30 0.22                          27,120.79                     0.7629                               20,690.45
5 0.0893 987000                88,139.10 0.22                          19,390.60                     0.7130                               13,825.50
6 0.0892 987000                88,040.40 0.22                          19,368.89                     0.6663                               12,905.49
7 0.0893 987000                88,139.10 0.22                          19,390.60                     0.6227                               12,074.53
            9,42,979.80 Total                           1,65,942.52

Present value of tax saving on operating expense = annual operating expense * depreciation rate *PVAF(7%,10 years) = 69,200 * 0.22 * 7.0236 = $106927.29

sale value of asset at end of life = 0.1424*987000 = 140548.8

and book value = cost - total depreciation = 987000 - 942979.8 =44020.20

profit on sale = 140548.8 - 44020.20 = 110856.30

tax on profit = 96528.60* 0.22 = 21236.29

net cash flow from sale = 140548.8 - 21236.29 = $119312.51 and its presnent value = $119312.51 * 0.5083 = 60652.43

Present worth or value of new ESP = 987000 - 165942.52 - 106927.29 + 60652.43 = $774,782.62

Therefore we should select New ESP as its present value of net cash outflow is lesser.

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