Final answer:
To find the total cost of a meal including tax and tip, calculate the sales tax and tip separately and add them to the original cost of the meal. Mary-Sarah's total cost is $7.59.
Step-by-step explanation:
Calculating the Total Bill Including Tax and Tip
To calculate the total cost of a meal, including tax and tip, follow these steps:
- First, calculate the sales tax by converting the percentage to a decimal and multiplying it by the original cost of the meal. For a 5% sales tax on a $6.60 meal, the calculation is 0.05 × $6.60 = $0.33.
- Next, calculate the tip amount. A 10% tip on the original $6.60 meal costs 0.10 × $6.60 = $0.66.
- Add both the sales tax and the tip to the original cost to find the total amount paid. So, $6.60 + $0.33 + $0.66 = $7.59.
Mary-Sarah would thus pay a total of $7.59 for her meal, which includes the cost of the meal, sales tax, and tip.