Suppose that you are using the naïve forecasting method with trend to forecast sales. If sales have been increasing by 40% per month, and this month's sales amounted to $1200, what would your forecast be for next month?
a) $1200
b) $ 480
c) $1680
d) $ 720
e) $1600
Answer: c) $1680
1200 - (.4 * 1200) = 1200 - 480 = 720
1200 + 480 = 1680