Final answer:
To find a restaurant bill's final amount including sales tax and tip if paying by credit card, calculate and add both the sales tax percentage of the total food cost and the desired tip percentage to the original bill.
Step-by-step explanation:
The main answer to finding a guest's point balance, in the context of a restaurant, typically involves checking the restaurant's customer loyalty system. However, considering the provided reference information, this question appears to be incorrectly phrased for its context. Instead, if we're discussing calculating the final restaurant bill with tips and taxes, here's how to do it:An example given illustrates a bill of $47.50 with a 6% sales tax. Calculate the sales tax by multiplying the total bill by the sales tax rate ($47.50 * 0.06 = $2.85). Add this to the original bill ($47.50 + $2.85 = $50.35). Then determine the tip. Assuming a 20% tip, you would calculate $47.50 * 0.20 to get $9.50 as the tip. The final amount, incorporating the sales tax and tip, would be $50.35 + $9.50 = $59.85.Concluding, to find out the final payment amount including sales tax and tip, add the calculated sales tax and tip to the initial total. This method ensures the server receives their rightfully earned tip, especially when the payment is made via credit card.