Let j be the cost of the jellyfish and e be the cost of the eel.

We know that j + e = $200 and e = 9j.

Substituting the second equation into the first equation, we get j + 9j = $200

Combining like terms, we get 10j = $200

Dividing both sides by 10, we get j = $20

Substituting this value back into e = 9j, we get e = 9 * $20 = $<<9*20=180>>180

# Answer

180
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
An avant-garde sushi house sells jellyfish for a certain amount and eel for nine times that amount. If the combined cost of one order each kind of sushi is $200, how much does the eel cost?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
180
An avant-garde sushi house sells jellyfish for a certain amount and eel for nine times that amount. If the combined cost of one order each kind of sushi is $200, how much does the eel cost?
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