For a chemical company that relies heavily on quartz, which is a common and abundant mineral, the supply manager should focus PRIMARILY on A. ensuring long-term availability of supply. This focus is crucial because the success and growth of the new product depend on the consistent availability of quartz. While price and efficiency are important considerations, the primary concern should be securing a reliable supply chain that can support the company's long-term production needs12.

In the situation where the selected bidder wants to raise its quoted rates due to the scarcity of qualified trainers:
* Binding Quotation: Remind the supplier that their quoted rates are binding. This ensures that the supplier adheres to the terms of the initial agreement, maintaining integrity and preventing cost escalations after the bid has been accepted.
* Contract Enforcement: Emphasize the importance of contract enforcement to maintain fairness and transparency in the procurement process.
* Negotiation: If necessary, negotiate within the agreed terms, but initially, the focus should be on holding the supplier accountable to their quoted rates.
By reminding the supplier that their quoted rates are binding, the supply manager upholds the integrity of the procurement process and ensures that the organization is not subjected to unexpected cost increases.
References:
* Contract management principles in procurement.
* Institute for Supply Management (ISM) guidelines on handling procurement disputes and negotiations.

* Item cost: $0.76
* Packaging for shipment: $0.02
* Shipping from Indonesia: $0.14
* Duty: $0.03
* Customs clearance: $0.10
* Storage at buyer's warehouse: $0.09
* Shipment from warehouse to plant: $0.06
* Calculate the total landed cost per unit: Sum of all the costs.
* Total Landed Cost = $0.76 + $0.02 + $0.14 + $0.03 + $0.10 + $0.09 + $0.06 = $1.20 References
* CIPS. (n.d.). Understanding Total Landed Cost in Procurement.
* ISM. (n.d.). Calculating Total Landed Cost for Procurement Decisions.

* Contract Law Principles: Generally, a contract is binding if both parties have mutually agreed to the terms.
* Error in Bid: If the error in Supplier A's bid was not known or reasonably should not have been known by JKL, Supplier A is obligated to honor the bid.
* Breach of Contract: Refusal to perform under these circumstances would constitute a breach of contract by Supplier A.
* Possible Remedies: JKL may seek remedies such as enforcing the contract, seeking damages, or re-awarding the contract to another supplier.
References
* Contract Law Cases and Textbooks
* Legal Precedents on Contractual Errors
* Procurement and Supply Chain Management Resources