Busdriver.....your maths seems pretty poor, I doubt you'd get through a command course..............
If a delay of 18 months costs you 1.77 Million dollars
then the extra 5 years working gains you 5.9 million dollars
Hence net GAIN 4.13 Million Dollars
HMMMMMM................
and your provident fund continues to grow for 5 years.
Kinda puts a different light on things....................