I'm Lucy. I'm 14 years old. I come to China this year. Now I'm in Beijing International Middle School. I like animals . I think they're my good friends. When I go to school this morning, I meet a man with a cage  . Five birds are in it .
" How do you get these birds?" I ask .
" I give them some food . When they come to eat it , I get them ." The man says .
" They are too poor . Why do you get them ?" I ask the man .
" It's very interesting !" The man says .
" I need to do something ." I think . I want to help the birds .
" Can I buy them ?" I ask .
" Well ," he says , "Give me 50 yuan and your jacket ."
I don't want to give my jacket to him because I like it very much . But for these birds I do it .
The man gives me the cage. Then I let the birds fly out   of the cage . I am happy to do that .
How much are the birds?   _  .
$50 $50 and the price of a jacket. Y=50 Y=50 and the price of a jacket.