George Kyparisis owns a company that manufactures sailboats. Actual demand for? George's sailboats during each of the past four seasons was as? follows:
Season 1 2 3 4
Winter 1440, 1280, 1000, 920
Spring 1500 ,1440, 1620 ,1500
Summer 1000, 2140, 2020, 1960
Fall 640, 770, 650, 560
George has forecasted that annual demand for his sailboats in year 5 will equal 6,500 sailboats.
Based on the given data and using the multiplicative seasonal? model, the demand level for? George's sailboats in the spring of year 5 will be