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Lan co: 16000 dong

Lien co: 18000 dong

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https://www.google.com.vn/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwiZ3JL2vOPWAhUMwLwKHQFhCF0QjRwIBw&url=https%3A%2F%2Fwww.123rf.com%2Fphoto_16162125_vector-illustration-of-ukrainian-national-pattern-ornament.html&psig=AOvVaw2Uq-mBYQgHlGAPMZX9cAAs&ust=1507636229074128

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSGQV_xao88buje-WqeALvSpzj5U1KbqAqwtYgEYOwlUBchdirh

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQejebVK1u9YmPPOuCNxi7s9S9HWTjtgk7lmcyUl14JouJg3OrM

https://previews.123rf.com/images/balabolka/balabolka1412/balabolka141200036/34259937-Abstract-decorative-vector-tribal-ethnic-background-pattern-Stock-Photo.jpg

https://www.google.com.vn/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwiQy4bovOPWAhULi7wKHZMaCSQQjRwIBw&url=https%3A%2F%2Ftrunghochoangdao.blogspot.com%2F2014%2F10%2Fdan-toc-hmong-i.html&psig=AOvVaw2Uq-mBYQgHlGAPMZX9cAAs&ust=1507636229074128

   174-126+214-274+226+186 

= (174+226)-(126+274)+(214+186)

=400-400+400

=400