Here are the data for the past 21 months for actual sales of a particular product: LAST YEAR THIS YEAR January 300 275 February 400 375 March 425 350 April 450 425 May 400 400 June 460 350 July 400 350 August 300 275 September 375 350 October 500 November 550 December 500 Develop a forecast for the fourth quarter using a three-quarter, weighted moving average. Weight the most recent quarter .5, the second most recent .25, and the third .25. Do the problem using quarters, as opposed to forecasting separate months. (Round your answer to 2 decimal places.)
