In the calculations, a limited lifetime of 10 years is applied
instead of a general economic lifetime (for most equipment
20 years). This is because projections indicate the
mean amount of plastic mass will decrease with time.
Thus, the average mass of plastic that will be collected
per year will likely be lower than what has been calculated
using the 10-year deployment time. Lastly, the resale
value of any capital infrastructure is conservatively
assumed to be zero, as its sales price is too uncertain.
However, any CapEx sales would reduce the total cost of
the project. Resale revenue would also be applied against
decommission expenses.