From the first I read the story bells sounded,and lights came on. They are all stalling to get their stories straight,and the bodies buried. They are not usually concerned with the cost of anything when it comes to other people's money---they are Democrats first and also politicians.
If funding is the problem, take the total employment of every agency under the Inspector General and divide the Inspector General's budget by that amount. Then take that amount and multiply it against the total employees in each agency and charge that agency their pro-rata share of the total expense. The larger agancies will pay their proportionate share and no one will be charged twice.
The way the cost is being calculated now is political gobbleygook!