An investor bought of Apple Inc. on three occasions at the following prices.
Date Price . . . . . . . . . . . . . . . Per Share
January 2016 . . . . . . . . . . . . . . .94.81
July 2016. . . . . . . . . . . . . . .. . . .102.67
December 2016. . . . . . . . . . . . 115.32
a. What is the average price per share if the investor had bought 100 shares in January, 60 in July, and 40 in December?
b. What is the average price per share if the investor had bought 40 shares in January, 60 in July, and 100 in December?
