please answer all the question

Al Khaleej Inc. needs 400 kgs of a material per month. It costs RO 100 to make and receive an order, and it takes 16 workdays to receive it. The annual holding cost is 15% of purchase price. The price RO 2 per kg. The company is operating 6 workdays per week in a 52-week year. At what quantity in kgs you may place a new order? Round-up to the nearest integer Select one: a. 180 b. 200 c. None is correct d. 188 e. 247 Advertising and promotion are methods of manipulating product or service supply in aggregate planning. Select one: a. True b. False A certain type of computer costs RO 800, and the annual holding cost is 20% of the value of the item. Annual demand is 10,000 units, and the order cost is RO 150 per order. What is the approximate economic order quantity? Round-up to the nearest integer Select one: a 50 b. None is correct c. 90 d. 137 e. 110 Given there are five (05) sample taken. The sample mean (X-bar) are; 8.51, 8.18, 11.07, 10.03, and 10.23 respectively, Also, Range values for these 5 samples are; 3.33, 2.61, 3.39, 4.39, and 6.49. If the lower controllimit for X-bar chart is 7.664, what should be the most appropriate the sample size? Select one: a. 3 b.6 C. 5 d. None is correct e. 4 Al Maha Company is specialized in mangoes distribution in the city of Muscat. Sales are 420 boxes per month (four weeks). It costs OR 10 to make and receive an order and holding cost is OR 3.5 per box per year. The prices per unit depend on quantities purchased such that the order quantities from 1 to 199 at a unit price RO 5; quantity 200 to 499 at a unit price 4,5 RO; and quantity 500 and more at a per unit price of 4 RO. What is the Economic Order Quantity while not consider the purchase cost? Round-up to the nearest integer Select one: a. None is correct b. 200 c. 180 d. 166 e. 199 Demand for a product is forecasted for the six periods is 263, 256, 301, 312, 304, and 294. If a LEVEL PRODUCTION strategy is adopted with a constant production of 280 units per period. The regular production cost is RO 12 per unit, whereas the overtime and subcontract costs are RO 20 and RO 25 per unit respectively. There is no limit on subcontracting; however, maximum overtime production capacity is 10. Average inventory holding cost is RO 5 per unit per period. What will be inventory level at the end of period 4? Select one: a. 20 b. 17 c. None is correct d. 41 e