Jesse buys his coworkers lunch from this local steakhouse. The food cost $105.79 in the sales tax rate is 9%. Jesse wants to leave a 20% tip based on the pre-tax amount how much will the total be including tax and tip.
The sales tax on the food will be: $105.79 * 0.09 = $<<105.79*0.09=9.53>>9.53
The pre-tax amount is: $105.79 - $9.53 = $<<105.79-9.53=96.26>>96.26
The tip amount is: $96.26 * 0.20 = $<<96.26*0.20=19.25>>19.25
The total amount including tax and tip will be: $105.79 + $9.53 + $19.25 = $<<105.79+9.53+19.25=134.57>>134.57. Answer: \boxed{134.57}.