Spring George Kyparisis owns a company that manufactures salboats. Actual demand for George's sailboats during each of the past four seasons was as follows: Season Winter Year 1 2 3 4 1,480 1,240 1,000 920 1,500 1,440 1,040 1,500 Summer Fall 1,040 2,140 2,040 1,000 680 750 670 500 George has forecasted that annual demand for his sailboats in year 5 will equal 5,600 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 sailboats (enter a whole number).