20minutes of air in one diving tank
£288 per diving tank
8hours work a day 480minutes
44 tanks of air
£12,672 on air for 1 person.
1million workers = £12672000000 on air alone.
£46400000 on wages.
£12718400000 per day it takes to build, thats without the cost of materials, so you can add about £1000000000 on for those since the city needs to be 100% air tight.
and it should take about 50years to build.
total is: £636920000000
thats $99260330790365 for any Americans who wish to know.
if anyone wants to correct me on any of my maths go ahead, there not the best in the world.