Final answer:
The incremental net operating income for Andretti Company when increasing production and sales by 30%, with an additional $140,000 in fixed selling expenses, is $487,840.
Step-by-step explanation:
The incremental net operating income from producing and selling an additional 30% of Daks at Andretti Company, assuming a $140,000 increase in fixed selling expenses and no increase in fixed manufacturing overhead, can be calculated as follows:
Additional units: 88,000 units * 30% = 26,400 units
Additional Revenue: 26,400 units * $48/unit = $1,267,200
Additional Variable Costs: (Direct materials $9.50 + Direct labor $9.00 + Variable manufacturing overhead $2.90 + Variable selling expenses $2.70) * 26,400 units = $639,360
Additional Fixed Selling Expenses: $140,000
Therefore, incremental net operating income = Additional Revenue - (Additional Variable Costs + Additional Fixed Selling Expenses) = $1,267,200 - ($639,360 + $140,000) = $487,840.