问题如下：
Calculate the total return on a share of equity using the following data:
Purchase price: $50
Sale price: $42
Dividend paid during holding period: $2
选项：
A.–12.0%
B.–14.3%
C.–16.0%
解释：
A is correct.
The formula states Rt = (Pt – Pt–1 + Dt)/Pt. Therefore, total return = (42 – 50 + 2)/50 = –12.0%.
这道题目的公式是什么？对应的知识点是什么
