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
November 592
December 555

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. Do the problem using quarters, as opposed to forecasting separate months. (Round your answer to 2 decimal places.)

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