Marvel Manufacturing Inc. provides you with the following data for the month of June: Prime costs were $195,000, conversion costs were $140,000, and total manufacturing costs incurred were $270,000. Beginning and ending work in process inventories were equal. Selling and administrative costs were $200,000. a. What were the total costs of direct materials used, direct labour, and manufacturing overhead? b. What were the total costs of production? c. What were the tolal period costs