Part II. Stock Planning: Efficiency (10 points) 4. The net sales in the neckwear department were $270,000, with a stock turnover of 3. Find this department's average stock at retail. (2 points) 5. Departmental gross sales for the year were $270,000 with customer returns of 10%. During the year these inventories were taken: Date January 1 Inventory value (R) $37, 000 April 1 July 1 October 1 December 1 $36,500 $41,500 $46,500 $38,500 Find: (a.) The average stock for the year (2 points). (b.) The annual rate of turn (3 points)