The bill for dinner totaled 56 dollars before tax and tip. The restaurant added a 6 percent sales tax. If Sandra wants to include a 16 percent tip calculated on the bill before sales tax is added, what is the total cost of the dinner?

The sales tax is 6% of $56, which is $3.36. The tip is 16% of the pre-tax bill, so it is 0.16 × $56 = $8.96. Add the bill, tax, and tip: $56 + $3.36 + $8.96 = $68.32, so the total cost is 68.32 dollars.

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