1. **State the problem:** You and 3 friends (4 people total) went to lunch. The original bill was 82. You have a 20% off coupon. 2. **Calculate the discounted price:** The discount is 20% of 82, so discount amount = $82 \times 0.20 = 16.4$ Discounted price = original price - discount = $82 - 16.4 = 65.6$ 3. **Calculate the sales tax:** Sales tax is 7% of the discounted price. Tax = $65.6 \times 0.07 = 4.592$ 4. **Calculate total including tax:** Total = discounted price + tax = $65.6 + 4.592 = 70.192$ 5. **Calculate total including tip:** Tip is 20% of the total with tax. Tip = $70.192 \times 0.20 = 14.0384$ Total with tip = $70.192 + 14.0384 = 84.2304$ 6. **Split the bill evenly:** Number of people = 4 Each pays = $\frac{84.2304}{4} = 21.0576$ **Final answers:** - Discounted price before tax and tip: $65.60$ - Tax amount: $4.59$ - Total including tax: $70.19$ - Total including tax and tip: $84.23$ - Each person pays: $21.06$