Real property taxes; delinquent tax sale; when commenced and concluded

On the day designated in the notice of sale, the county treasurer or his or her designee shall commence the sale of the real property on which the taxes and charges have not been paid and shall continue the sale from day to day, Sundays and holidays excepted, until each item of real property or so much thereof as is sufficient to pay the taxes and charges thereon, including the cost of advertising, has been sold or offered for sale.