1. [单选题]C Co uses material B, which has a current market price of $0·80 per kg. In a linear program, where the objective is to maximise profit, the shadow price of material B is $2 per kg. The following statements have been made:
A. (i) Contribution will be increased by $2 for each additional kg of material B purchased at the current market price
B. (ii) The maximum price which should be paid for an additional kg of material B is $2
C. (iii) Contribution will be increased by $1·20 for each additional kg of material B purchased at the current market price
D. (iv) The maximum price which should be paid for an additional kg of material B is $2·80
E. Which of the above statements is/are correct?
F. (ii) only
G. (ii) and (iii)
H. (i) only
I. (i) and (iv)
2. [单选题]In 2014 Mr Yuan inherited an estate of RMB2 million from his uncle who had died two months earlier.
A. What is the correct treatment of the estate income for individual income tax purposes?
B. The estate income is not taxable
C. The estate income will be taxed as occasional (ad hoc) income
D. The estate income will be taxed as other income
E. The estate income will be taxed as service income
3. [单选题]19 What is the company’s return on shareholders’ equity?
A. 15/40 = 37·5%
B. 20/100 = 20%
C. 15/100 = 15%
D. 20/150 = 13·3%
解析：Statement (ii) is wrong as it reflects the common misconception that the shadow price is the maximum price which should be paid, rather than the maximum extra over the current purchase price.
Statement (iii) is wrong but could be thought to be correct if (ii) was wrongly assumed to be correct.