The Cost of the Eight Letters Versus Eight Characters

If it's eight letters, even with the p bk f two function, it's only 29 dollars to crack that password. In five seconds. But when you increase the character space to include all the principal characters, then that's where it becomes 920 thousand dollars. So if they do the be crypt one for about a hundred mill seconds on eight characters, it costs you about a hundred and 30 thousand dollars worth of hardware to do that. To go from a hundredmill seconds to three seconds takes 30 times as long. For your in user to do a log in, are they going to care about three seconds? Maybe not.