Rite Aid pharmacy in Big Rapids, Michigan is using simple exponential smoothing to predict monthly birthday card sales. At the end of October 2004, the pharmacy's forecast for December 2004 sales was 400. In November, 420 cards were sold, and during December, 425 cards were sold. At the end of December 2004, what is the pharmacy's forecast for the total number of cards that will be sold during March and April of 2005? Use α = 0.50.