Is there a copy editor in the house? Businessmen are suddenly breaking into song.

Transposition is a common error in content writing. It can either turn a word meaningless, in which case spellcheck will likely catch it, or it can turn a word into an entirely different one, in which case spellcheck will skip right over it. Behold:

Singing a letter of intent

Although business transactions in the US would be a lot more interesting if we moved towards karaoke meetings as is common in parts of Asia, I sincerely doubt this particular entrepreneur sang his letter of intent as indicated in the copy.