### Home > MC1 > Chapter 8 > Lesson 8.4.2 > Problem 8-122

8-122.

Keep in mind that *x*, *y*, and *z* each represent different things as listed above.

If you take a tally of each letter represented above, you will have a count of Manaya's order.

Manaya's friend Conner wanted to find the cost of Manaya's drinks on her trip to Quick and Cheap Drive-Thru.

He used the expression *x* + *x* + *x* to represent this. Can you use this expression and complete it to include all of Manaya's order?

The correct expression is *x + x + x + y + y + z + z + z + z*. This can also be simplified to equal 3*x* + 2*y* + 4*z*.

Manaya bought three drinks that each cost $0.79. How much did she spend on drinks?

Now calculate how much she spent on sandwiches and potatoes to find the total cost of her order.