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What do you add to the regular price in order to find the total amount when including a tip?

  1. The amount of discount

  2. The calculated tip amount

  3. The original service cost

  4. Sales tax percentage

The correct answer is: The calculated tip amount

To determine the total amount when including a tip, you take the regular price of the service and add the calculated tip amount based on that price. The calculated tip amount is a portion of the regular price, typically expressed as a percentage (like 15%, 18%, or 20%), which reflects the expected gratuity for the service provided. By adding this tip to the regular price, you arrive at the total amount you will pay. For instance, if a meal costs $50 and you decide to leave a 20% tip, you would calculate the tip as $10 (which is 20% of $50). Adding this to the regular price gives you a total of $60. The other options represent aspects that do not contribute directly to calculating the total with a tip. The amount of discount reflects a reduction in price, the original service cost alone does not account for additional charges, and the sales tax percentage pertains to taxation rather than gratuity. Therefore, the only option that provides a direct addition to the regular price to find the total amount due is the calculated tip amount.