All costs within this document are adjusted by year using producer price index (PPI) multipliers by the U.S. Bureau of Labor Statistics (BLS). The use of BLS PPI indices is adopted from GETEM; however only a subset of the indices used in GETEM are required within genGEO. All fundamental relations in genGEO and this supplemental information are given in US 2002 dollars, unless specifically mentioned otherwise. The main manuscript provides results in 2019 dollars. To convert from 2002 dollars to the desired year, multiply the 2002 dollar amount by the most relevant price index. Table shows the price indices used in genGEO and have a 2002 reference year (i.e. in 2002, 1.000) for various types of equipment. This is the same method used by GETEM, except GETEM uses several different reference years.