This question concerns the accounting treatment of idle capacity costs, specifically when they arise from avoidable causes.

Understanding Idle Capacity Costs

Idle capacity refers to the difference between the actual output of a production facility and the maximum possible output it could achieve under normal conditions. This unused capacity can arise from various factors:

• Avoidable Causes: These are inefficiencies or problems within management's control. Examples include machine breakdowns due to poor maintenance, labor strikes, power failures, or poor planning leading to machine downtime.
• Unavoidable Causes: These are factors beyond management's immediate control or are inherent in the production process. Examples include planned maintenance, seasonal fluctuations in demand, or normal setup times between production runs.

Treatment of Avoidable Idle Capacity Costs

Costs associated with idle capacity stemming from avoidable causes are generally considered losses or expenses rather than costs of production. This is because they represent inefficiencies that could have been prevented.

Let's analyze the options:

• Prime Cost: This includes direct materials, direct labor, and direct expenses. Idle capacity costs are not direct costs and therefore are not part of prime cost.
• Factory Overhead: Factory overheads are indirect costs of production. While costs related to *unavoidable* idle capacity might sometimes be treated as part of factory overheads (and absorbed into production costs), costs from *avoidable* causes are typically excluded because they don't relate to the actual production activity but rather to operational inefficiencies.
• Cost of Production: This encompasses prime cost and allocated factory overheads. Since avoidable idle capacity costs are treated as losses, they are not included in the cost of goods produced.
• Costing Profit and Loss Account: This account is used to record revenues, costs, and gains or losses. Costs resulting from inefficiencies and controllable factors, like idle capacity costs due to avoidable causes, are treated as period charges or losses and are transferred to the Costing Profit and Loss Account for proper recognition.

Therefore, costs arising from avoidable causes of idle capacity are transferred to the Costing Profit and Loss Account.