$3,560 credit to Cash is posted twice as two credits to Cash.
(1) Difference between Debit and Credit Columns
(2) Column with the larger Total
(3) Identif account(s) incorrectly stated
(4) Amount that account(s) is overstated or understated

You can just test this. Just make up a couple of numbers that match. You only need two accounts to do this. One has to be cash since that's what they're referring to. Make up a balance bigger than 3560, just a nice round number like 10,000. Since cash is a debit account, just pick another account to credit and make it 10,000 also. Like Fees Earned.

So you have debit/credit balancing at 10,000. That number would already include the credit that's supposed to be in cash cause that's the correct version. But since it was posted twice, post it again and re-balance the cash. You won't match anymore, because that second posting was the mistake.

Then look at what happened to your mini trial balance.