Detailed information on the costs of Clear Skies can be found in the Clear Skies Act Analytical Support Package (2002).
Detailed information about Clear Skies is in the package.
It's still being debated whether 123 suffocated and 23 survived or  only  43 died, leaving 21 survivors, but however many died, they were enough impetus for Clive to crush Siraj-ud-daula at the Battle of Plassey.