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?(1 point)

To calculate the total amount Jesse will pay for the lunch, including tax and tip, you can follow these steps:

1. Calculate the sales tax: \[ \text{Sales Tax} = \text{Cost} \times \text{Sales Tax Rate} \] \[ \text{Sales Tax} = 105.79 \times 0.09 = 9.5171 \text{ (round to } \approx 9.52) \]

2. Calculate the total cost including tax: \[ \text{Total Cost with Tax} = \text{Cost} + \text{Sales Tax} \] \[ \text{Total Cost with Tax} = 105.79 + 9.52 = 115.31 \]

3. Calculate the tip (based on the pre-tax amount): \[ \text{Tip} = \text{Cost} \times \text{Tip Rate} \] \[ \text{Tip} = 105.79 \times 0.20 = 21.158 \text{ (round to } \approx 21.16) \]

4. Calculate the total amount spent (including tip): \[ \text{Total Amount} = \text{Total Cost with Tax} + \text{Tip} \] \[ \text{Total Amount} = 115.31 + 21.16 = 136.47 \]

Therefore, the total amount Jesse will pay, including tax and tip, is approximately $136.47.