The per-unit figure is not a single thing
A per-unit figure on a printed quotation is the sum of roughly seven independent cost terms, and a buyer who treats the figure as a single number cannot see the tradeoff inside it. The seven terms are the blank substrate, the decoration method and its setup, the colour count, the size breakdown, the packaging standard, the quality-assurance depth and the delivery terms. Each is a lever; each has a working range. The cheapest production is the one in which every lever is at its cheapest setting; the most resilient is the one in which each lever is set where its economy is silent and its quality is durable.
Blank substrate moves the figure more than any other term. A 180-gram combed cotton tee at a recognised blank is materially more expensive than a 160-gram open-end cotton tee at an unknown blank. The difference is fabric weight, yarn quality, dye consistency between batches and the supplier's own QA. On an order of a few hundred pieces, the substrate can be the single largest cost term on the invoice. Switching blanks is the most common reason two quotations at the same product description land at different prices.
Decoration is the second term and behaves differently. On a screen-printed apparel order of 25 units the decoration term is dominated by setup, which is amortised over a small base; on 2 000 units it is dominated by per-unit ink and machine time. A cheaper per-unit decoration figure is almost always a cheaper substrate or a shorter process, and a buyer who compares two quotations should ask which lever was moved. Cheap substrate often hides behind a quoted price; cheap decoration rarely does.
Size breakdown is a quiet driver. An order of 500 pieces split across XS to XXL in roughly equal quotas adds a sizing run on every production step, and small-quantity sizes raise the per-unit cost of stock holding and small-batch garment sourcing. An order of 500 pieces in two or three sizes drops a step, and the per-unit figure falls. Suppliers quoting both will usually quote the broken size breakdown higher and explain why in the notes; suppliers who do not explain the difference are usually quoting a heavily skewed size mix.
Packaging and fulfilment are the silent terms. A polybag and a master carton is the standard. A branded mailer, a printed insert card, a tissue wrap, a sticker on the outside and a per-piece quality check are all separate line items. Each is cheap by itself; together they add a meaningful per-unit cost and a meaningful per-order cost. They are also the terms most likely to be negotiated silently, because a CFO sees the line item as "packaging" rather than "customer experience".
Quality-assurance depth is the term most often left off a quotation. A single in-line inspection is the floor. A pre-production sample, an in-line check at 25%, 50% and 75%, and a final AQL inspection against a published standard is the working standard. Skipping pre-production samples is the single most common way a corporate order arrives off-brand; skipping the in-line checks is how a defect escapes into a finished batch.
Delivery terms close the per-unit figure. A standard production window into Armenia by ground freight from an Asian blank supplier is roughly forty-five to sixty-five business days plus sea transit; a similar order by air freight is two to three weeks and roughly doubles the logistics per-unit cost. A domestic blank supplier cuts transit to days but at a premium unit price. The choice is rarely between speed and slow; it is between price and timing, and the right answer depends on whether the order is for a specific event or for a rolling corporate programme.