Pricing

Gang sheets are billed the way the market bills them: by the length of film the order uses, on a roll of fixed width. The builder measures; your store prices. Nothing on the Print.App side holds a rate. While the customer works, the builder keeps sending the billable value to the product page, so the price they see moves as they add pieces. When they save, the same facts ride the order line.

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What the builder measures

• Used length — how much of the roll the packed sheet takes, from the film’s top edge to the bottom of the lowest piece. Gaps and edge padding count; they are part of what the customer used.
• Billable length — the used length rounded up to the billing increment (inch, foot, centimeter) and never below the minimum billable length. With fixed sheet lengths the value is the number of sheets.
• Sheets — an order longer than the maximum sheet length overflows onto a second sheet; the billable total is the sum across sheets.

The summary’s Sheet space figure shows the customer what they have used against the maximum, and how much of the length they are already paying for is still empty — pieces added there cost nothing extra.

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Path 1 — Print Options (recommended)

Set Price target to po:dimensions and add a Print Options option set to the product with a Per length price modifier on the film choice. The builder streams the film width and used length into the widget, which prices live and verifies the total on our servers at add-to-cart. A typical film choice: with a $3 setup fee and a$10 minimum order. Example. Four logos at 40/30/30/25 copies pack into 13” of 22” film. Billed per inch that is 13” = 1.083 ft × $8 =$8.67, plus the $3 setup: **$11.67**. Add a fifth logo that fits in the free length and the price does not move.

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Path 2 — a theme input (no Print Options)

Set Price target to the CSS selector of a quantity input on your product page, for example #quantity or input[name="quantity"]. The builder writes the billable value into it — inches, feet, centimeters or sheet count, matching Bill per — and fires the input’s change event, so whatever your theme or pricing app does with quantity happens with the length. This suits a product priced per inch or per foot with a plain unit price. It cannot do length tiers, setup fees or server-side verification; the price is whatever the store computes from the quantity.

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Path 3 — Transfers by size

In this mode the customer never sees a sheet. Each design gets a print size and a copy count, and the order is priced by print area with cumulative copy breaks, which is how transfers are sold. Set Price target to po:quantity (or a theme quantity selector) and give the film choice a Per area modifier with quantity tiers: The builder pushes the total copy count and hands the widget the total print area on save. Example. A 4” × 4” design × 10 copies plus a 2” × 6” design × 5 copies is 15 copies over 220 sq in. At the 15-copy rate: 220 × $0.045 =$9.90, plus a $2 setup: **$11.90**. Fourteen copies of a 4” × 5” design would cost $17.40, fifteen$15.50 — the copy break makes the larger order cheaper, which is exactly the incentive shops want.

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Showing the price in the builder

Set Price display source to po:price and the builder shows the Print Options total in its summary, updating as the customer works. On a theme without Print Options, point it at the element that shows the line total — many themes render only the unit price, which would be misleading in the builder. Leave it empty to hide the price.