Jesse bought his co-workers lunch from the local steakhouse. The food costs $105.79. Sales tax is 9%, and he wants to leave a 20% tip. How much will the total be , including tax and tip?
Sales tax on the food will be 105.79 * 0.09 = $<<105.79*0.09=9.53>>9.53.
The total bill, including tax but not tip, will be 105.79 + 9.53 = $<<105.79+9.53=115.32>>115.32.
The total bill, including tax and tip, will be 115.32 * 1.20 = $<<115.32*1.20=138.384>>138.384. Answer: \boxed{138.384}.