Use ChatGPT to prepare a comparison and a clarification draft from quotes you are permitted to share. OpenAI's prompting guidance, checked October 24, 2026, supports providing the relevant sources and retaining missing information. The calculations below are an original fictional example, not live purchasing advice or an actual supplier evaluation.
Define the required purchase before comparing prices
A small studio needs ten identical mounting kits delivered to its workshop. Each kit must include a bracket and fasteners. The studio will compare amounts in US dollars; tax treatment has not been supplied.
| Quote | Supplied terms | Unresolved point |
|---|---|---|
| A | Ten complete kits: $180; delivery included | Tax treatment not stated |
| B | Complete kit: $15 each; delivery $40 per order | Tax treatment not stated |
| C | Brackets: $12 each; delivery included | Fasteners and their cost not stated; tax treatment not stated |
For the known amounts, A is $180 and B is 10 × $15 + $40 = $190. B's lower unit price does not produce a lower known delivered amount for ten kits. C's 10 × $12 = $120 buys the quoted brackets; it is not a complete-kit comparison.
None of those amounts is established as an all-in total because tax treatment is unresolved. Keep that qualification beside the numbers, where the buyer will see it.
Preserve the comparison basis
The federal government's proposal-analysis guidance explains why differences in quantities and terms matter when comparing prices. Its contracting rules apply in their own federal context. Here, the practical lesson is to document the scope and conditions of the studio's comparison, using its own purchasing process.
List the requirement, quoted item, unit, quantity, currency, delivery charge, included components, timing, and exceptions separately. If a quote says “box,” confirm the contents before treating it as one kit. If delivery timing is a requirement, a price comparison alone cannot establish that a supplier meets it.
Use the supplier's actual wording beside any normalized field. This makes a mistaken interpretation easier to find before it becomes a recommendation.
Ask for a comparison and the questions it cannot answer
Prepare a procurement comparison draft using only these supplied quotes.
Requirement: 10 complete mounting kits, each containing one bracket
and the required fasteners, delivered to our workshop.
Currency: USD. Tax treatment: not supplied.
A: 10 complete kits $180, delivery included.
B: complete kits $15 each, delivery $40 per order.
C: brackets $12 each, delivery included; fasteners not mentioned.
Show the original quote wording beside normalized item, unit, quantity,
included components, delivery, known calculated amount, and unknowns.
Explain each calculation. Do not substitute zero for an absent charge.
Do not call C a complete-kit offer without confirmation. Do not call
any figure all-in while tax treatment remains unknown.
Draft concise clarification questions about missing components,
tax treatment, and any delivery requirement we have not supplied.
Separate a known-price comparison from a purchasing recommendation.
Do not invent quality scores, savings, supplier performance, approval,
or delivery promises. Do not contact a supplier or place an order.
For real quotes, use exact source IDs and dates. Check whether an offer has expired and whether the quantity you want qualifies for the stated price. A copied price from an earlier purchase may describe different terms.
Review the cheapest-looking row first
If the draft names C as the winner at $120, return to the component requirement. The correct disposition is “incomplete scope; clarification required.” If it names B at $150, restore the $40 delivery charge and inspect the other formulas for excluded costs.
This comparison happens before ordering. The procurement SOP guide covers a different stage: preserving request, purchase-order, and receiving references after the authorized process has progressed.
Have the responsible buyer resolve the quote questions and apply the organization's actual evaluation and approval rules. Keep the final comparable terms with the decision so a later reviewer can see what was purchased and why.