Calculate EOQ from the following details: Consumption per month is 2,000 units, ordering cost is RO 10 per order, purchase price is RO 100 per unit and annual carrying cost is 5%. O a. 283 units O b. 310 units Oc 245 units O d. 219 units In which method of costing, the cost are ascertained for group of products. O a Marginal O b. Process C. Batch O d. Service