Annual social value of U.S. CBB system by scenario 2010-2016

The source gives the following explanation for the calculations and the scenarios:
"To provide a lower bound, we used Scenario 1 and assumed that all patients received a 4/6 match. Next, as an intermediate set of assumptions, we assumed that all patients received a 5/6 match and used Scenario 2 in terms of effectiveness. Finally, we used Scenario 3 and assumed 6/6 matches to provide an upper bound. For the upper-bound estimate, we multiplied the number of annual pediatric recipients by 23 years (from Table 9.2, Scenario 3 with a 6/6 match), and for adult patients we multiplied the total adult units shipped by five years (from Table 9.2, Scenario 3 with a 6/6 match). This gives us an estimate for the total number of life years saved over all patients who received a cord blood transplant in one year. Finally, we multiplied total expected life years gained by $100,000 to estimate the total use value per year for the years 2010–2016. Column three in Table 9.3 displays the results. Thus, our estimates of the average annual value of the CBB system range from a lower bound of $883 million to $1.7 billion."