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?
Two cups of lemonade amount to $2 x 2 = $<<2*2=4>>4.
Two sandwiches amount to $2.50 x 2 = $<<2.5*2=5>>5.
So, the total amount that Roxanne had to pay was $4 + $5 = $<<4+5=9>>9.
Thus, her change must be $20 - $9 = $<<20-9=11>>11.
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Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

Marcus had 18 pebbles. He skipped half of them across the lake, but Freddy gave him another 30 pebbles. How many pebbles does Marcus have now?Marcus had 18/2 = <<18/2=9>>9 pebbles left.
After Freddy gave him more, he has 9 + 30 = <<9+30=39>>39 pebbles.
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John's neighbor tells him to walk his dog for 1 hour each day for a total of $10. He does this for April, save for the 4 Sundays in April. He later spent $50 on books and gave his sister Kaylee the same amount. How much money did John have left?April has 30 days, so if he didn't walk the dog on Sundays, he worked for a total of 30 days - 4 days = <<30-4=26>>26 days.
If each day he earned $10, he ends up with 26 days * $10/day = $<<26*10=260>>260 .
After buying books and giving his sister $50, he ends up with $260 - $50 - $50 = $<<260-50-50=160>>160
#### 160[END]

Now, solve this next question in the style of the above examples:

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?

### Response:
Two cups of lemonade amount to $2 x 2 = $<<2*2=4>>4.
Two sandwiches amount to $2.50 x 2 = $<<2.5*2=5>>5.
So, the total amount that Roxanne had to pay was $4 + $5 = $<<4+5=9>>9.
Thus, her change must be $20 - $9 = $<<20-9=11>>11.
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