Reverse spelling (crumb for crum, a word in which b has no justification) is also a trivial mistake.
反向拼写（crum 拼成 crumb，b在这里没有理由存在）也是微不足道的错误。
2
Otherwise, part B have to pay all the lose of Part A and also relative lose occurred by mistake and part B have to responsibility for all the mistakes per law.