An audit will trivially reveal if the trade data matches the balances caused by deposits and withdrawals.
An audit done by whom? By Mark? Gonzague? Roger Ver?
Why are you trying to make this more difficult than it is by playing stupid? They have just as much interest as us in finding the lost funds. Which means they will put capable people on the task of figuring out exactly what happened to out funds. There will probably be a criminal investigation as well.