please answer all the questions quickly

Al Khaleej Inc. needs 400 kgs of a material per month. It costs RO 100 to make and receive an order, and it takes 12 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. What is the expected time in weeks) between order? Round-up to the nearest integer Select one: a. 185 b. 117 c. None is correct d. 190 e. 207 A manager wishes to build a control chart for a process. A total of five (05) samples are collected with four (04) observations within each sample. The sample means (X-bar) are: 14.5, 13.94, 16.86, 18.77, and 16.64 respectively. Also, the corresponding ranges are; 9.90, 773,4,51, 7.56, and 3.49 respectively. The lower and upper control limits of the x- bar chart are respectively Select one: a. None is correct b. 11.21, 20.91 c. 18.55, 13.47 d. 12.21, 19.91 e. 11.47, 16.55 The quality inspector at Toshiba checks Laptops after production. The inspector has a list of standards/specification and checks if the produced laptops meets the standards and specification. Toshiba addresses ---product quality dimension Select one: a. Reliability b. Courtesy c. None of the options listed is correct d. Durability e. Aesthetics Al Maha Company is specialized in mangoes distribution in the city of Muscat. Sales are 480 units per month. It costs OR 10 to make and receive an order and holding cost is OR 3.5 per unit per year. The prices 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. If the discount option is considered, then the what is the total annual cost of the best option including purchasing cost Select one: a. 29813 b. 24031 c. 21619 d. 23548 e. None is correct A company would like to classify its inventory systems using ABC inventory classification system. The rules for ABC classification are STRICTLY applied such that 80% cumulative budget is assigned to A class inventory items. The next 15% cumulative budget is assigned to B class inventory items, and only 5% of the cumulative budget is assigned to C class inventory items. The inventory items (SKU) are SKU, SKU2, SKU3, and SKU4 respectively, The Annual demands (units per year) for these items are 290, 457, and 159, and 577 respectively. Also, the corresponding per unit prices are 19, 33, 126, and 90 respectively measured in OMR. Which items (among, SKU, SKU2, SKU3, and SKU4) are classified as A class inventory Select one: a. None is correct b. Both SKU3 and SKU4 c. Only SKU3 d. SKU1 only e. All items