Final answer:
Break-even points are calculated based on fixed costs and contribution margin ratio. The companywide break-even point might differ from the sum of individual office break-even points due to different cost structures. An increase in sales in Minneapolis or Chicago would affect the net operating income and require an updated income statement respectively.
Step-by-step explanation:
To analyze the given situation and answer the questions, it's essential to use concepts of break-even analysis and the relationship between revenues, variable costs, fixed costs, and profit.
Question 1-a
The companywide break-even point in dollar sales is calculated by using the formula:
Break-even point (in dollars) = Fixed Costs / Contribution Margin Ratio
Question 1-b
The break-even point for each office is also calculated using the same formula but using the fixed costs and the contribution margin ratio for each respective office.
Question 1-c
The companywide break-even point may not be equal to the sum of the break-even points of the Chicago and Minneapolis offices due to the differing cost structures and contribution margins of each office.
Question 2
The increase in the company's net operating income due to an increase in sales by Minneapolis would be the additional sales multiplied by the contribution margin ratio specific to that office.
Question 3
A new segmented income statement for the company would incorporate the increased sales in the Chicago office and would show how this affects the overall company's income, assuming fixed costs do not change.