years	sales kUS$	Capital costs  kUS$	total Operating cost kUS$	gross cashflow kUS$
1	76 833	585 608	115 321	-624 097
2	222 072	96 522	209 445	-83 895
3	426 147	104 579	292 232	29 336
4	412 180	50 128	249 999	112 053
5	412 180	14 454	249 999	147 727
6	412 180	14 454	249 999	147 727
7	412 180	14 454	249 999	147 727
8	412 180	14 454	249 999	147 727
9	412 180	14 454	249 999	147 727
10	412 180	14 454	249 999	147 727
11	412 180	14 454	249 999	147 727
12	412 180	14 454	249 999	147 727
13	412 180	14 454	249 999	147 727
14	412 180	14 454	249 999	147 727
15	412 180	14 454	249 999	147 727
16	412 180	14 454	249 999	147 727
17	412 180	14 454	249 999	147 727
18	412 180	14 454	249 999	147 727
19	412 180	14 454	249 999	147 727
20	412 180	14 454	249 999	147 727
totals	7 732 118	1 068 100	4 866 985	1 797 033
IRR%	14.5%
NPW MUS$ at 6% PW factor	632
NPW MUS$ at 8% PW factor	417
NPW MUS$ at 10% PW factor	251	NPW MUS$ at 14.5% PW factor	0
NPW MUS$	1 797	632	417	251	0
NPW factor %		6%	8%	10%	14.5%