About how much will a 459.95 LCD TV cost including the sales tax of tax of 8.25

8.25% of whatever, is 8.25/100 * whatever, now ... to get the 8.25% of 459.95, then that'll be 8.25/100 * 459.95, that's the sales tax, now, add that amount to the price tag of 459.95, and that's how much it costs with tax