Table 22
Present worth calculation
Net cash flow
141.4
32.7
32.8
32.8
32.9
32.9
32.9
32.9
32.9
32.9
51.5
Discounted at 10 %
Discount factor
1.0
0.909
0.826
0.751
0.683
0.621
0.564
0.513
0.467
0.424
0.385
Present worth
141.4
29.7
27.1
24.6
22.5
20.4
18.6
16.9
15.4
13.9
19.8
Cumulative
PW
141.4
111.7
84.6
60.0
37.5
17.1
1.5
18.4
33.8
47.7
67.5
Discounted at 15 %
Discount factor
1.0
0.870
0.756
0.658
0.572
0.497
0.432
0.376
0.327
0.284
0.247
Present worth
141.4
28.4
24.8
21.6
18.8
16.4
14.2
12.4
10.8
9.3
12.7
Cumulative
PW
141.4
113.0
88.2
66.6
47.8
31.4
17.2
4.8
6.0
15.3
28.0
Discounted at 25 %
Discount factor
1.0
0.800
0.640
0.512
0.410
0.328
0.262
0.210
0.168
0.134
0.107
Present worth
141.4
26.2
21.0
16.8
13.5
10.8
8.6
6.9
5.5
4.4
5.5
Cumulative
PW
141.4
115.2
94.2
77.4
63.9
53.1
44.5
37.6
32.1
27.7
22.2
Discounted at 30%F
Discount factor
1.0
0.769
0.592
0.455
0.35
0.269
0.207
0.159
0.123
0.094
0.073
Present worth
141.4
25.1
19.4
14.9
11.5
8.9
6.8
5.2
4
3.1
3.8
Cumulative
PW
141.4
116.3
96.9
82
70.5
61.6
54.8
49.6
45.6
42.5
38.7
740
D.S.J. Jones and P.R. Pujado ´