If Fighting Kites uses variable costing, what was its operating income?

Absorption, variable, and throughput income and inventory; method for manager
bonus Fighting Kites produces several different kite kits. Last year, the company
produced 20,000 kits and sold all but 2,000 kits. The kits sell for $30 each. Costs
incurred are listed here.
Materials purchased $ 50,000
Materials used 40,000
Other variable production costs 60,000
Fixed production costs 100,000
Variable selling costs 18,000
Fixed selling and administrative costs 100,000
Beginning inventory last year held 2,000 kits. Assume that under variable costing, the value
of this inventory would have been $10,000. Assume that under absorption costing, the value
of this inventory would have been $15,000. The company used the LIFO cost flow
assumption.
REQUIRED:

A. If Fighting Kites uses variable costing, what was its operating income?
B. If Fighting Kites uses throughput costing, what was its operating income?
C. If Fighting Kites uses absorption costing and normal volume of 25,000, what
was its operating income?
D. If you were asked to make a recommendation for the absorption costing
denominator level for next period’s operations, what would you suggest? Explain
your choice.
E. If the manager of Fighting Kites is given a bonus based on income, which
type of income statement would you recommend to evaluate manager