1. Prepare an income statement for 2020 assuming that the production-volume variance is written off at year-end as an adjustment to cost of goods sold. 2. The president has heard about variable costing. She asks you to recast the 2020 statement as it would appear under variable costing. 3. Explain the difference in operating income as calculated in requirements 1 and 2. 4. Graph how fixed manufacturing overhead is accounted for under absorption costing. That is, there will be two lines: one for the budgeted fixed manufacturing overhead (which is equal to the actual fixed manufacturing overhead in this case) and one for the fixed manufacturing overhead allocated. Show the production-volume variance in the graph. 5. Critics have claimed that a widely used accounting system has led to undesirable buildups of inventory levels. (a) Is variable costing or absorption costing more likely to lead to such buildups? Why? (b) What can managers do to counteract undesirable inventory buildups?