问题如下：
The following statements are about the
methods of pricing deposits. Which of the following statement is NOT correct?
选项：
A.Pricing deposit-related services at cost plus profit margin: this method matches prices and costs more closely and eliminate many formerly free services.
B. Conditional Pricing: in this
method customer pays a price conditional on his uses of deposit account.
For the marginal cost to set interest rates on deposit: marginal cost = change in total cost = new interest rate × New funds raised at new rate - Old interest rate × Total funds raised at old rate
D. Relationship
Pricing: in this method, pricing deposits according to the number of services
the customer uses.
解释：
考点：对Managing and Pricing Deposit Services的理解
答案：C
解析：
C选择错误。再求Marginal
cost时，正确的公式应为：
Marginal cost = change in total cost = new
interest rate × Total funds raised at new rate - Old
interest rate × Total funds raised at old rate
请问A选项中说Pricing deposit-related services at cost plus profit margin: this method matches prices and costs more closely and eliminate many formerly free services. 为什么说eliminate many formerly free services呢？
