Your lunch bill is $19.75. A 5% sales tax will be added, and you want to give a tip of about 20% of $19.75. Estimate how much you will pay for lunch.

20 + 1 tax + 4 tip

To estimate how much you will pay for lunch, you need to calculate the sales tax and the tip, and then add them to the original bill.

1. Calculate the sales tax:
Multiply the original bill amount ($19.75) by the sales tax rate (5%).
Sales tax = $19.75 * 0.05 = $0.9875

2. Calculate the tip:
Multiply the original bill amount ($19.75) by the tip rate (20%).
Tip = $19.75 * 0.20 = $3.95

3. Add the original bill, sales tax, and tip together to get the total amount:
Total amount = $19.75 + $0.9875 + $3.95 = $24.6875

Rounding it to two decimal places, the estimated amount you will pay for lunch is $24.69.