Using arithmetic average of $420 million a year is incorrect, because inflation is exponential. Conservatively estimating 2% inflation and holding all else equ

Using arithmetic average of $420 million a year is incorrect, because inflation is exponential. Conservatively estimating 2% inflation and holding all else equal, that comes out to about $312 million for year 1, $318m for year two, etc. This comes out to about $12.6 billion over 30 years. bmurray7jhu is right to call out this mistake, because TFA says $381m is the current yearly budget, which is actually enough to fund it. (other issues not withstanding). Messing this calculation up makes me question the rest of the TFA's integrity.