Segment Analysis The Charles Schwab Corporation (SCHW) is one of the more innovative brokerage and financial service companies in the United States. The company provided information about its major business segments as follows (in millions) for a recent year. Investor (Retail) Advisor Services Services Revenues $4,747 $2,292 Operating income before 1,132 555 taxes 141 Depreciation and 57 amortization a. How do you believe Schwab defines the difference between the segments? b. All of the following would be considered to be variable costs in the "Investor (Retail) Services" segment except: c. Estimate the contribution margin for each segment assuming that depreciation and amortization are the only fixed assets incurred. Investor (Retail) Advisor Services Services Operating income before taxes $ Plus depreciation and amortization $1 Estimated contribution margin d. If Schwab decided to sell its "advisory services" accounts to another company, estimate how much operating income would decline. Assume that the fixed costs that serve advisory services (computers, servers, and facilities) would not be sold but would be used by the other sector. million