Step 1: Understanding the Concept:
Agricultural machinery cost analysis divides costs into Fixed Costs (ownership costs that occur regardless of machine use) and Variable/Operating Costs (costs incurred proportional to hours of operation).
Key Formula or Approach:
\[ \text{Fixed Costs (DIRTI)} = \text{Depreciation} + \text{Interest} + \text{Repairs/Housing} + \text{Taxes} + \text{Insurance} \]
Step 2: Detailed Explanation:
Standard fixed ownership costs for farm machinery comprise the DIRTI elements:
1. Depreciation: Loss in value over time due to age and obsolescence.
2. Interest on Investment: Capital cost of tied-up money.
3. Taxes and Insurance: Legal protection and statutory dues.
4. Housing Shelter: Storage space protection.
Overhead charges refer to general administrative/supervisory expenses or operational variable overheads, which are not categorized as direct machinery fixed ownership costs.
Step 3: Final Answer:
Thus, Overhead charge is NOT considered under the primary fixed costs of a machine, corresponding to option (C).