Incidental costs sometimes are ignored in inventory costing because Incidental expenses are minor, non-budgeted expenses that are not directly related to primary service and do not arise during the normal course. Incidental cost which include the costs of transportation, meals, and lodging are common when an employee travels for business Inventory costs.
By calculating the most economic order quantity the firm attempts to determine the order size that will minimize the total inventory. Such practice of ignoring the incidental cost is permitted by materiality constraint because such cost will not affect the decisions of the business entity costs.
Materiality constraint means that transactions of little importance should not be recorded. A transaction may be recorded, but its importance and significance should be kept in mind. For example, a newly purchased pencil is an asset of the business. Whenever the pencil is used, a part of the asset is consumed.
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