Jesse buys his co-workers lunch from the local steakhouse the food costs $ 105.79 and sales tax ratE is 9% Jesse wants to leave a 20% tip based on the pre tax amount how much will total be including tax and tip

To calculate the total amount Jesse will pay, we can break it down into several steps:

1. Calculate the sales tax: The sales tax is 9% of the pre-tax amount, which is $105.79. \[ \text{Sales Tax} = 105.79 \times 0.09 = 9.4781 \] We can round this to $9.48 for simplicity.

2. Calculate the total cost including tax: Add the sales tax to the pre-tax amount. \[ \text{Total with Tax} = 105.79 + 9.48 = 115.27 \]

3. Calculate the tip: The tip is 20% of the pre-tax amount. \[ \text{Tip} = 105.79 \times 0.20 = 21.158 \] We can round this to $21.16.

4. Calculate the final total: Add the total with tax and the tip. \[ \text{Final Total} = 115.27 + 21.16 = 136.43 \]

Therefore, the total amount Jesse will pay, including tax and tip, is $136.43.