The economic order quantity is a decision model used by management that assumes that the same quantity is ordered at each order point. the demand is known with certainty. the ordering costs and carrying costs are known with certainty. all of the above are correct. None of the above is correct. Some of the major draw backs of Economic Order Quantity model are that it ignores cost of stock-outs it ignores the quality of material ordered. it ignores the shrinkage of the order all of the above are true, c. Only a and b are true. Unit cost information is very important to management because it is used for: determining the selling price of the manufactured product. bidding on a contract when competitive bidding is required. analyzing the profitability of a product. all of the above are true. None of the above is true. Effective control of operations by management is achieved by: delegating responsibility. responsibility accounting periodic measurement of actual performance against a planned result. Only b and c are correct. all of the above are correct. The most popular costing systems in used in practice are: Job order costing Process costing Activity-based costing All of the above are true e. Only a and b are true