The balance in the Raw Material Inventory at any point in time equals Select one: O a. the manufacturing cost of jobs ordered but not yet started into production O b. the sum of the manufacturing costs for all jobs in process but not yet completed. O c. the sum of the materials, labor and overhead costs paid during the period. d. the costs for jobs finished during the period but not yet sold. e the manufacturing costs of all jobs started during the period, completed or not