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Volumes are calculated at least once per year and weighted prices are to be used only as an indication of the market . There are colorful tins that sit in my parents ' front closet that she 's used at least since the ' 70s to hold the fruits of her labor . Unless otherwise indicated , most of the material collected from in class questionnaires will be used at least partly to illustrate points presented in the class , and you will have access to the summary data . Conversion of habitat for agricultural uses has eliminated at least four populations of striped adobe lily . It was thought that a proper regard for the King 's quality and the amount of the sum demanded required that the letter should be brought at least by an express messenger , and Henry was both diverted and indignant at these proceedings , at the months long delay before the princes had thought proper to make application for his protection , and then for this cool demand for alms on a large scale as a proper beginning of their enterprise . However , it makes sense that candidates using the exception should have passed at least one of the three Core Battery tests , and that the exception not allow use of Core Battery Test scores achieved for an indefinite time after September 1 , 1999 .