Final answer:
To calculate the total bill including sales tax and tip, multiply the cost of the dinner by the tip percentage.
Step-by-step explanation:
To calculate the total bill including sales tax and tip, we need to first find the amount of the tip and then the sales tax.
The tip is calculated by multiplying the cost of the dinner by the tip percentage. In this case, Evan wanted to leave a 32% tip, so the amount of the tip is $31 * 0.32 = $9.92.
The sales tax is calculated by multiplying the cost of the dinner by the sales tax percentage. Since there is no given sales tax percentage in the question, we cannot calculate the exact sales tax amount.
To find the total bill, we add the cost of the dinner, the tip, and the sales tax together. But since we don't know the exact sales tax amount, we can only calculate the meal plus the tip. The total amount is $31 + $9.92 = $40.92.