Question: Here are the data for the past 21 months for actual sales of a particular product: LAST YEAR THIS YEAR January 315 300 February 418

Here are the data for the past 21 months for actual sales of a particular product:

LAST YEAR THIS YEAR

January 315 300

February 418 400

March 390 350

April 430 460

May 400 390

June 480 395

July 430 355

August 320 245

September 385 340

October 530 0

November 592 0

December 555 0

Develop a forecast for the fourth quarter using a three-quarter, weighted moving average. Weight the most recent quarter 0.50, the second most recent 0.25, and the third 0.25. Solve the problem using quarters, as opposed to forecasting separate months.

forecast for the 4th quarter:

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