Mark’s food for lunch cost $12. The restaurant added a 5 percent sales tax, $0.60, to the bill. Mark wants to pay a 20 percent tip on the total bill including sales tax. What is the amount of the tip?

Add the $0.60 sales tax to the $12 meal cost to get a total bill of $12.60. The tip is 20% of $12.60: 0.20 × $12.60 = $2.52. Therefore, the tip is $2.52, choice C.

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