The tasks in the sales and operations planning step include creating the sales plan, specifying inventory requirements, and creating a production plan. Suppose according to sale forecasting, the sales plan and target stock have already known, and the initial stock is 0, fill in the table. SOP planning table January(31days) February(28days) March(31days) April(30days) Sales plan 5000 4000 5400 6000 Production Stock level Target stock 200 400 300 400 Day's supply