Carpinski, in response to a letter by the Marion School District board of education, submitted a bid on May 1, offering to perform custodial services at Marion High School for a two- year period at a salary of $ 30,000 per year. At a board of education meeting held on May 13, the board passed a resolution offering Carpinski a salary of $ 25,000 per year. On May 15, Carpinski received a copy of this board resolution in the mail. Does a contract exist between Carpinski and the board of education?