To calculate Bailey's total cost for lunch, we can break it down step by step:
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Calculate the sales tax:
- Cost of food: $21.25
- Sales tax rate: 9% (or 0.09)
\[ \text{Sales tax} = \text{Cost of food} \times \text{Sales tax rate} = 21.25 \times 0.09 = 1.9125 \]
Rounding to the nearest cent, the sales tax is $1.91.
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Calculate the total cost of food including tax: \[ \text{Total cost including tax} = \text{Cost of food} + \text{Sales tax} = 21.25 + 1.91 = 23.16 \]
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Add the delivery fee:
- Delivery fee: $3.50
\[ \text{Total cost including delivery} = \text{Total cost including tax} + \text{Delivery fee} = 23.16 + 3.50 = 26.66 \]
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Add the tip:
- Tip: $4.00
\[ \text{Total cost including tip} = \text{Total cost including delivery} + \text{Tip} = 26.66 + 4.00 = 30.66 \]
Therefore, Bailey will spend a total of $30.66 on lunch.