Hanks Corporation produces a single product. Operating data for the company and its absorption costing income statements for the last two years are presented below: Variable manufacturing costs are $4 per unit. Fixed manufacturing overhead was $18,000 in each year. This fixed manufacturing overhead was applied at a rate of $2 per unit. Variable selling and administrative expenses were $1 per unit sold. Required: a. Compute the unit product cost in each year under variable costing. b. Prepare new income statements for each year using variable costing. c. Reconcile the absorption costing and variable costing net operating income for each year