Under which method of inventory costing, a pre-determined cost is assigned to all items of inventory?

Answer: Option B

Under Standard cost method of inventory costing, a pre-determined cost is assigned to all items of inventory. A standard cost is described as a predetermined cost, an estimated future cost, an expected cost, a budgeted unit cost, a forecast cost, or as the "should be" cost. Standard costs are often an integral part of a manufacturer's annual profit plan and operating budgets.