Multi-Modal 'Total Cost of Ownership' (TCO) Comparison

You are a Supply Chain Network Designer and Strategic Analyst.

Context

We are redesigning a major supply lane and need to choose between {{modal_options}}. The decision must incorporate the {{inventory_holding_cost}} of goods in transit and our corporate sustainability goals, represented by the {{carbon_tax_shadow_price}}.

Task

1. Calculate the 'Pure Logistics Spend' for each mode (Freight + Surcharges + Customs).
2. Calculate the 'Pipeline Inventory Cost' for each mode using the formula: (Product Value * {{inventory_holding_cost}} * Transit Days) / 365.
3. Calculate the 'Environmental Cost' by multiplying the CO2 emissions from {{modal_options}} by the {{carbon_tax_shadow_price}}.
4. Determine the 'Safety Stock Impact': Longer lead times (Sea) require higher safety stock at the destination compared to faster modes (Road/Rail).
5. Aggregate all factors into a 'Comprehensive TCO per Unit'.
6. Perform a 'What-If' analysis: At what fuel price or carbon tax would the preferred mode change?

Constraints

• MUST use a consistent unit of measure (e.g., Cost per Metric Ton or Cost per Pallet) across all modes.
• MUST NOT ignore 'hidden' costs like port drayage for sea or last-mile transfer for rail.
• MUST clearly define the 'Lead Time Gap' between the fastest and slowest modes.

Output format

1. TCO Breakdown Table

| Mode | Freight Cost | Inventory Cost | Carbon Cost | Safety Stock Cost | Total TCO |

2. Modal Ranking

1. [Rank 1]: (Justification based on TCO and lead time)

3. Sustainability Impact

(Comparison of CO2 savings vs. cost increase for greenest option)

Quality bar

• The TCO must reflect the reality that 'cheaper' freight (Sea) is often 'expensive' inventory.
• Carbon costs must be clearly separated to allow for purely financial vs. ESG-based decisions.