Answer all 4 questions below. Thoroughly explain the answer for each question

1. Absorption Costing vs. Variable Costing: What's the Difference?
2. Throughput costing method vs Absorption and variable. What is the difference?
3. Distinguish between the single-rate method and the dual-rate method.
4. Distinguish among the step-down method, direct method, and reciprocal method of allocating costs of support departments to operating departments.