
Concept explainers
To Calculate: To calculate the total cost after adding sales tax and tip, both as a percentage of the cost of the item.

Answer to Problem 31CP
The total cost is
Explanation of Solution
Given Information: The cost of the pizzas is
Method: To find the total cost of the order, separately multiply the cost with the percentages of the sales tax and the tip and add the two products to the cost.
Multiply the cost separately with the percentages of sales tax and tip.
Sales tax
Tip
Total cost of the order
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