National Scan, Inc., sells radio frequency inventory tags. Monthly sales for a seven-month period were as follows:
Month Sales (000)Units
Feb. 18
Mar. 17
Apr. 11
May. 21
Jun. 17
Jul. 21
Aug. 25
b. Forecast September sales volume using each of the following:
(1) A linear trend equation. (Round your intermediate calculations and final answer to 2 decimal places.)
Yt thousands
(2) A five-month moving average. (Round your answer to 2 decimal places.)
Moving average thousands
(3) Exponential smoothing with a smoothing constant equal to .40, assuming a March forecast of 19(000). (Round your intermediate forecast values and final answer to 2 decimal places)
Forecast thousands
(4) A weighted average using .60 for August, .10 for July, and .30 for June. (Round your answer to 2 decimal places.)
Weighted average thousands