Answer:
To calculate the total cost with a 20% tip, you can add 20% of the initial cost to the original price.
Original cost: $40.25
Tip (20% of $40.25): 0.20 * $40.25 = $8.05
Total cost: $40.25 + $8.05 = $48.30
So, the correct answer is $48.30.
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