To get ready for the new school year, Mary brought her two kids shopping. She bought her son James, a coat for $40 and two pairs of jeans. She bought his sister Jamie, a pair of shoes for $30. The total cost of the items was $110. If the two pairs of jeans for James cost the same price, how much did one pair of jeans cost?
The total spent on both pairs of jeans was $110 - $40 - $30 = $<<110-40-30=40>>40.
One pair of jeans would cost $40 / 2 = $<<40/2=20>>20.
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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:

At camp Wonka, there are 96 campers.  Two-thirds of the campers are boys, and the remaining one-third are girls.  50% of the boys want to toast marshmallows and 75% of the girls want to toast marshmallows.  If each camper gets one marshmallow to toast, how many marshmallows do they need?The girls make up one-third of the campers, so there are 96 /3 = <<96/3=32>>32 girls.
The boys make up two-thirds of the campers, so there are 32 + 32 = <<32+32=64>>64 boys.
There are 32 x 75% = <<32*75*.01=24>>24 girls who want to toast marshmallows.
There are 64 x 50% = <<64*50*.01=32>>32 boys who want to toast marshmallows.
They need 24 + 32 = <<24+32=56>>56 marshmallows.
#### 56[END]

Stan hires a magician for $60 an hour.  He works 3 hours every day for 2 weeks.  How much money does he pay the magician?The magician works for 2*7=<<2*7=14>>14 days
So the magician works 14*3=<<14*3=42>>42 hours
So that means he pays 42*60=$<<42*60=2520>>2520
#### 2520[END]

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

To get ready for the new school year, Mary brought her two kids shopping. She bought her son James, a coat for $40 and two pairs of jeans. She bought his sister Jamie, a pair of shoes for $30. The total cost of the items was $110. If the two pairs of jeans for James cost the same price, how much did one pair of jeans cost?

### Response:
The total spent on both pairs of jeans was $110 - $40 - $30 = $<<110-40-30=40>>40.
One pair of jeans would cost $40 / 2 = $<<40/2=20>>20.
#### 20