The cost of a 650 cf/hr process unit in 1998 was $9,245,000. From historical cost records the cost capacity factor of the process unit is 0.6. Use order of magnitude method to estimate the cost of Historical Cost Indexes Year Historical Cost Index Jan. 1, 1993 - 100 Est. Actual Year Historical Cost Index Jan. 1, 1993 - 100 Actual 143.7 2004 2003 2002 1320 2229 215.6 128.7 1401 125.1 120.9 117.6 115.. 1128 1102 076 201922753 2018 2017 2016 2015 2014 3 2013 2012 1 2011 2010 2009 2008 w 2007 2006 2005 207.3 2062 2049 2012 w 1946 191.2 183.5 1801 Te 18074 2001 2000 1999 100 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 104.4 101.7 99.4 96.8 94.3 921 89.9 87.7 169.4 1620 1516 Time Adjustment Using the Historical Cost Indexes. Index for Year A x Cost in Year B = Cost in Year A Index for Year B a similar process unit with a capacity of 750 cf/hr in 2018.(6/100) O a $10,073,814 Ob $19,508,793 Oc. $18,887,382 Od $18,485,791