please help with formulas

Six- Mosth Budget/Seass: | Department / Boyer's Name Here are some trends that can be analyzed to forecast a realistic sales % change for the planned Fall Season: - The nationwide economy is moving briskly; top management has planned an overall store-wide sales increase of 7%. - This is an average for all departments. Some Departments will project higher sales than others at the Department-level planning. - Within Accessories Department: - Legwear has had a strong surge of sales for the first six-month period (sales were planned with a 15% increase but actually were ahead 23% over the year before); fashion influences of long, leggy looks with slits in dresses and skirts continue as important apparel looks; the rising trend for legwear in the Spring season, - After 4 dismal years, also saw the revival of body suits which has stabilized to a fair contribution of total sales. - The textured hosiery introduced in the spring is doing very well. It is retailing at 20% higher retail prices is expected to create an explosion. - Also, cold weather scarves are growing in demand and are expected to increase the scarves sales by 15% from last year. - Belts & sunglasses is the only classification that is not doing too well and may experience another sales dip of 2% from last year