净现值（NPV） = 现值（PV）- 需要的投资额 = 373 832 -350 000 = 23 832美元
NPV = PV -required investment = 373, 832 - 350, 000 = $23, 832
四个通常的产生统计以比较方案的用于投资决策方法是：现值法、年值法、期望值法和回报率法。
Four commonly used investment decision methods that generate statistics to compare projects are present worth, annual worth, future worth, and rate of return.
债券的价值等于投资者将来所收到的利息收入和本金以及票面溢值的现值之和。
The value of a bond is the present value both of future interest to be received and the par or maturity value of the bond.
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