Labor estimating is normally recorded in both hours and dollars. An element in the work breakdown structure was estimated to require one month for accomplishment. The element was estimated at 1,000 hours of labor and at a burdened cost of $60,000. The task was completed in 1,000 hours but at a burdened cost of $500,000. With no further information available, the likely reason for the cost increase could be: Select one: Higher salaried employees were assigned Overtime was required The overhead rate increased Employee salaries had increased Any or all of the above