Based on my cash handling experience
Down to the penny.
I was in charge of the check disbursing section for the US Army in Europe. Monthly expenditures had to balance to the penny.
Also in charge of the cash vault, funded military (US) banks in Europe. Also had to balance to the penny. One time, just after receiving a cash resupply shipment (3 milvans == 40' trailers) of coins, we had a surprise cash count. We were off in the count in the vault. I had to move every box (22"x11"x7", ~70#) until I found which boxes were stacked in the wrong place (Each box was coded with contents - penny/nickel/dime/quarter - paper money boxes balanced). 5 hours and 3000 boxes later, the vault balanced.
A good friend will come and bail you out of jail ... but, a true friend will be sitting next to you saying, "Damn...that was fun!"