Food cost $105.79 sales tax rate is 9%. I want to leave a 20% tip based on the pre-tax amount. How much will the total be including tax and tip?
First, let's calculate the sales tax amount.
Sales tax amount = Food cost * Sales tax rate
Sales tax amount = $105.79 * 0.09 = $9.52
Next, let's calculate the tip amount based on the pre-tax amount.
Tip amount = Food cost * Tip rate
Tip rate = 20% = 0.20 (as a decimal)
Tip amount = $105.79 * 0.20 = $21.16
Now, let's calculate the total cost including tax and tip.
Total cost = Food cost + Sales tax amount + Tip amount
Total cost = $105.79 + $9.52 + $21.16 = $136.47
Therefore, the total cost including tax and tip will be $136.47.