[Solved] The term observable universe refers to A)that portion of the universe that we have so far photographed through telescopes. B)the portion of the universe that can be seen by the naked eye. C)the portion of the universe that is not hidden from view by,for example,being below the horizon. D)that portion of the universe that we can see in principle,given the current age of the universe. Direct Labor-Hours: The total hours worked by employees directly involved in the manufacturing process or providing a service. Fixed Manufacturing Overhead: Costs that do not change with the level of manufacturing output, including salaries of managers and depreciation of factory equipment. Direct Labor-Hours: The total hours of labor directly involved in producing goods or providing services. Direct Labor Rate: The cost per hour for labor directly involved in the production of goods or services.