Jesse buys his coworkers lunch from the local steakhouse. The food costs $105.79, and 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 will be 105.79 * 0.09 = $<<105.79*0.09=9.53>>9.53
The tip will be 105.79 * 0.20 = $<<105.79*0.20=21.16>>21.16
The total cost will be 105.79 + 9.53 + 21.16 = $<<105.79+9.53+21.16=136.48>>136.48. Answer: \boxed{136.48}.