Problem: Return calculations For each of the investments shown in the following table, calculate the rate of return earned over the unspecified time period.
Investment cash flow beginning of end of during period period value period value
A -$ 100 $ 800 $1,100
B 15,000 120,000 118,000
C 7,000 45,000 48000
D 80 600 500
E 1500 12500 12400