The inspection of the minutes of meetings is an integral part of a CPA's audit of a corporation's financial statements. Discuss the effect each of the following situations would have on specific audit steps in a CPA's audit and on the auditor's opinion. 

1. The minute book does not show approval for the sale of an important manufacturing division which was consummated during the year. 

2. Some details of a contract negotiated during the year with the labor union are different from the outline of the contract included in the minutes of the board of directors. 

3. The minutes of a meeting of directors held after the balance sheet date have not yet been written, but the corporation's secretary shows the CPA notes from which the minutes are to be prepared when the secretary has time. 

4. The corporation's purchase of their principal product for resale are not mentioned in the minutes.