Correct Answer: The Fed does not have any reserves.
US Mint? Nope.
The gold and silver in the US mint doesn't enter into the equation because USD has not been backed by gold or silver for many years. USD, literally, is not worth the paper it is printed on. Its only value is as fiat currency -- which means that we have to hope that someone will exchange something of real value for our worthless dollar bills.
BEP? Nope.
It is true that the Fed can instruct the Bureau of Engraving and Printing to print up some mo dough. But, as I think someone else here stated, that takes time. Besides, it isn't necessary. Nowadays, it is a lot easier to just log onto a computer and add a few zeros to a bank account. And that is exactly where the Fed's reserves come from - White Folks pull it out their arse.
Federal taxes? Nope.
Most, if not all, of the federal taxes we pay goes to pay off the interest on the meteoric federal deficit. Hence, none of that money is available for "reserves" for the Fed. Instead, our federal income taxes are stolen by the Fed Res, which acquires our taxes indirectly, via interest it charges the Federal government to loan it money -- money that it creates out of thin air. Note that some articles do admit that the Fed supplies "reserve" money via bonds [i.e., loans].
The Fed Res makes serious do-re-mi [billions] from the interest on these loans. The Federal government pays the interest on these loans from our federal tax dollars. Which means that our federal taxes are not being used to pay for highways, or social programs, or the military. Instead, our taxes are going into the pockets of the thieves who run the Fed Res. Highways, social services, and the military are being paid for by money that the Fed Res literally creates out of thin air and then "loans" to the federal government, charging interest for the service, of course.
This is why inflation never goes away. It is supply and demand. All that imaginary money that the Fed Res pulls out its arse increases the money supply, which lowers the demand, which lowers the value of USD in relation of other currencies. And, all this translates into the ridiculously inflated prices we pay for everything.
But, our handlers have the media program into us that our high prices are due to the Chinese unfairly manipulating the USD exchange rate via their exports and we buy into all this because we Americans are uninformed, brainwashed fools -- no more than sheep who are easily led astray by wolves in sheep's clothing.
Money ain't real.