I'll give you a question, please answer with step-by-step reasoning process.
Roxanne bought 2 cups of lemonade for $2 each and 2 sandwiches for $2.50 each. How much change must she get from a $20 bill?

11
Two cups of lemonade amount to $2 x 2 = $4.

Two sandwiches amount to $2.

50 x 2 = $5.

So, the total amount that Roxanne had to pay was $4 + $5 = $9.

Thus, her change must be $20 - $9 = $11.

.

The answer is 11