The following bar diagram displays the number of workers employed in a manufacturing company for the last 6 years. On all workdays, the permanent workers work  10 hours while the temporary workers work 6 hours. One year has 300 workdays. Annual workhours for a person for a year is defined as the total number of hours of work put in by that person that year. Similarly, the annual workhours for a workforce, e.g., all workers, is the total number of hours of work put in together by all people in the workforce that year.