Select three different versions of backflush costing. 1. Stage A. Purchase of direct materials and incurring of conversion costs Stage D. Sale of finished goods 2. Stage C. Completion of good finished units of product Stage D. Sale of finished goods 3. Stage A. Purchase of direct materials and incurring of conversion costs Stage B. Production resulting in work in process 4. Stage A. Purchase of direct materials and incurring of conversion costs Stage C. Completion of good finished units of product 5. Stage B. Production resulting in work in process Stage C. Completion of good finished units of product Stage D. Sale of finished goods 6. Stage A. Purchase of direct materials and incurring of conversion costs Stage C. Completion of good finished units of product Stage D. Sale of finished goods