Andrew Su, CEO at brokerage Compass Global Markets said the average cost of producing gold in Australia, home to some of the world's biggest gold miners, has jumped from $500 an ounce in 2007 to over $1,000 an ounce this year.
Persons (plural) is a very formal word. We only use it in rather legalistic contexts: [notice in a lift] Any person or persons found in possession of illegal substances will be prosecuted.
People is human beings in general or considered collectively. A person is a human being regarded as an individual.If you are referring to two humans, yes, it would be grammatically correct to say persons. It is definitely a word. It is plural for an individual, but does not refer to a collective group of humans. It could be used in speaking about two humans of a household.