# Three people go to a restaurant. Their bill comes to $$\78.00$$. They decide to split the cost. One person pays $$\4.50$$; the next person pays 3 times that amount. How much will the third person have to pay?

$$\60.00$$

Explanation

First, figure out how much the second person paid: $$\4.50 \times 3= \13.50$$
Then, calculate the total amount contributed by the first two people: $$\4.50 + \13.50 = \18.00$$
Finally, calculate how much the third person will have to contribute by subtracting the amount paid $$(\18.00)$$ from the original amount owed $$(\78.00)$$:
$$\78.00 - \18.00 = \60.00$$