with a job order cost system , costs are accumulated by job. one advantage of a job order cost system is that the accumulation of costs for a particular job help to determine its selling price. Or, if a job is done under contract with set price, the profit or loss on the job can be readily determined by comparing the cost with the contract price at the same time , costs that have been accumulated for a certain type of work with assist management in preparing bids dor similar jobs in the future.