Cost Classification & Cost Sheet

TAKEAWAYS:

• Costs are classified by behavior (fixed/variable), traceability (direct/indirect), and function (manufacturing/non-manufacturing) to allocate resources efficiently.
• A cost sheet aggregates direct materials, direct labor, and overheads to compute total cost per unit, critical for pricing and profitability analysis.
• Prime cost (direct materials + direct labor) and works cost (prime + factory overhead) are key sub-totals in cost sheets.
• Absorption costing (full costing) vs. variable costing (direct costing) affects financial reporting and decision-making differently.
• Overhead allocation (using a predetermined rate) ensures accurate cost attribution, especially in process industries like fertilizer production.
• Cost sheets are used in Nepal’s NEPSE-listed companies and Daraz suppliers to set competitive prices and optimize production.

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1. Introduction to Cost Classification

Costs are categorized based on behavior, traceability, and function to aid decision-making. Misclassification leads to inaccurate pricing and financial losses.

1.1 Classification by Behavior

Costs are classified as fixed or variable based on their response to production volume.

Fixed Costs (do not change with production):

• Example: Factory rent, insurance, salaries of permanent staff.
• Real-world use: NTC’s fixed costs (e.g., tower maintenance) are spread across all subscribers to compute per-unit cost.

Variable Costs (change with production):

• Example: Raw materials, electricity for production, sales commission.
• Real-world use: Daraz’s variable costs (packaging, delivery fees) vary with each order.

1.2 Classification by Traceability

Costs are classified as direct or indirect based on their assignability to a product or service.

Direct Costs (easily traceable to a product):

• Example: Cotton for a textile factory, wages of machine operators.
• Real-world use: Pathao’s direct costs (fuel for drivers, driver wages) are tracked per ride.

Indirect Costs (not easily traceable):

• Example: Factory electricity, supervisor’s salary.
• Real-world use: Ncell’s indirect costs (network infrastructure) are allocated across all mobile services.

1.3 Classification by Function

Costs are classified into manufacturing, administrative, and selling/distribution costs.

Manufacturing Costs (incurred to produce goods):

• Example: Raw materials, factory wages, depreciation of machinery.
• Real-world use: Himalayan Fertilizer Corporation allocates manufacturing costs to each batch of fertilizer.

Administrative Costs (office-related):

• Example: Office rent, salaries of managers.
• Real-world use: NEPSE-listed companies like Nepal Investment Bank classify administrative costs separately for tax compliance.

Selling/Distribution Costs (incurred to sell goods):

• Example: Sales commission, delivery expenses.
• Real-world use: Daraz allocates selling costs per order to compute profit margins.

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2. Cost Sheet Preparation

A cost sheet is a statement that shows the total cost per unit of production, combining direct and indirect costs. It helps in pricing decisions, profit analysis, and cost control.

2.1 Components of a Cost Sheet

A typical cost sheet includes:

1. Direct Materials (DM)
2. Direct Labor (DL)
3. Factory Overheads (FO)
4. Prime Cost (DM + DL)
5. Works Cost (Prime Cost + FO)
6. Administrative Expenses (if applicable)
7. Selling/Distribution Expenses (if applicable)
8. Total Cost (Works Cost + Admin + Selling Expenses)

2.2 Example: Cost Sheet for a Kathmandu Retail Shop

Business: Saral Apparel (clothing manufacturer in Kathmandu) Product: Cotton shirts Data:

• Direct Materials (cotton, buttons): Rs 50 per shirt
• Direct Labor (sewing wages): Rs 30 per shirt
• Factory Overheads (electricity, rent): Rs 20 per shirt
• Administrative Expenses (office rent, salaries): Rs 15 per shirt
• Selling Expenses (sales commission, delivery): Rs 10 per shirt

Cost Sheet:

Visualization: The cost sheet can be visualized as a stacked bar chart where each segment represents a cost component.

**Total Cost per Unit**: Rs 125

Interpretation:

• Prime Cost (Rs 80): Core production cost (materials + labor).
• Works Cost (Rs 100): Includes overheads for factory operations.
• Total Cost (Rs 125): All costs incurred to produce and sell one shirt.

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3. Cost Sheet for a Manufacturing Company

Given Data:

• Direct Materials: Rs 70,000
• Direct Labor: Rs 120,000
• Direct Expenses: Rs 30,000
• Factory Rent: Rs 30,000
• Salaries: Rs 10,000
• Sales Commission: Rs 5,000
• Office Rent: Rs 15,000

Assumptions:

• Production Volume: 10,000 units
• Factory Overheads include factory rent and salaries.
• Administrative Expenses include office rent.
• Selling Expenses include sales commission.

Cost Sheet:

*Factory Overheads = Factory Rent (Rs 30,000) + Salaries (Rs 10,000)

Visualization: The cost sheet can be represented as a T-account for clarity.

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4. Comparison: Absorption Costing vs. Variable Costing

Real-world Tie:

• Absorption Costing: Used by banks (e.g., NMB) for regulatory reporting.
• Variable Costing: Used by Daraz to decide whether to produce more shirts during peak seasons.

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5. Overhead Allocation

Overheads are allocated using a predetermined rate based on a base (e.g., direct labor hours, machine hours).

Formula:

Overhead Rate = Estimated Overheads / Estimated Base

Example:

• Estimated Overheads: Rs 100,000
• Estimated Direct Labor Hours: 20,000 hours
• Overhead Rate: Rs 100,000 / 20,000 = Rs 5 per labor hour

Allocation: If a job requires 50 labor hours, overhead allocated = 50 × Rs 5 = Rs 250.

Real-world Use:

• Ncell allocates network maintenance costs (overheads) across all mobile services using a predetermined rate based on subscriber count.

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6. Practical Example: Total Cost for 5,000 Units

Given Data:

• Cost for 4,000 units: Rs 60,000
• Cost for 7,000 units: Rs 90,000

Assumption:

• Fixed Costs (FC): Rs 20,000 (constant)
• Variable Cost per Unit (VC): Rs 10 (varies with production)

Step 1: Calculate Variable Cost for 4,000 units

Total Cost (4,000) = FC + (VC × 4,000)
60,000 = 20,000 + (VC × 4,000)
VC = (60,000 - 20,000) / 4,000 = Rs 10 per unit

Step 2: Verify with 7,000 units

Total Cost (7,000) = 20,000 + (10 × 7,000) = Rs 90,000 (matches given data)

Step 3: Calculate Total Cost for 5,000 units

Total Cost (5,000) = 20,000 + (10 × 5,000) = Rs 70,000

Visualization: A cost-volume-profit graph shows how total cost changes with production volume.

**Graph**:

Total Cost (Rs) | | /
| /
| /
|/__> Production Volume

7. In the Real World

1. eSewa’s Transaction Costs:

   • Idea Used: Cost Classification by Function
   • How: eSewa classifies costs into manufacturing (server maintenance), administrative (office salaries), and selling (marketing) to compute per-transaction costs. Variable costs (e.g., payment processing fees) are tracked separately to optimize pricing.

2. Khalti’s Overhead Allocation:

   • Idea Used: Overhead Allocation
   • How: Khalti allocates fixed costs (e.g., cybersecurity infrastructure) across all payment methods using a predetermined rate based on transaction volume. This ensures accurate cost attribution for each payment service.

3. NEPSE’s Cost Sheet for Stocks:

   • Idea Used: Cost Sheet Preparation
   • How: NEPSE-listed companies like Nepal Bank prepare cost sheets to compute the total cost per share (including direct materials, labor, and overheads) for financial reporting. This helps in valuation and dividend decisions.

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8. Exam Tip

1. Master Cost Classifications:

   • Always classify costs by behavior, traceability, and function in exam answers. Use clear tables or diagrams to differentiate between fixed/variable, direct/indirect, and manufacturing/non-manufacturing costs.

2. Prepare Cost Sheets Step-by-Step:

   • Start with direct costs, then add overheads, and finally include administrative/selling expenses. Show calculations for prime cost, works cost, and total cost per unit.

3. Understand Overhead Allocation:

   • Know how to calculate the predetermined overhead rate and apply it to jobs. Example:

     Overhead Rate = Estimated Overheads / Estimated Base
     Allocated Overhead = Rate × Actual Base
     

4. Compare Costing Methods:

   • Differentiate between absorption costing (full costing) and variable costing (direct costing). Highlight their uses in external reporting vs. internal decisions.

5. Worked Examples:

   • Practice total cost calculations for given production volumes. Assume fixed and variable costs where not provided, and verify with multiple data points (e.g., 4,000 and 7,000 units).

6. Real-world Application:

   • Relate cost concepts to Nepali businesses (e.g., Daraz, Ncell, NEPSE). For example:
     • "How would Khalti allocate overheads to its mobile wallet service?"
     • "Why does a fertilizer company like Himalayan Fertilizer Corporation use process costing?"

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Final Note: Cost classification and cost sheet preparation are foundational for decision-making in Nepal’s business landscape. Whether you’re pricing a Daraz order or analyzing NEPSE stock valuations, mastering these concepts will give you a competitive edge in exams and real-world scenarios. Always show your work—examiners reward clear, structured answers with visual aids!