When one inbound charge covers several jewelry lines, a per-unit cost needs an allocation rule. Dividing the charge equally by product line may be easy, but it can obscure major differences in quantities or shipping weight. Choose a defensible basis, show the arithmetic, and reconcile the result to the original charge.
Define where this cost calculation stops
For this exercise, “landed cost” means merchandise purchase cost plus the selected inbound charge to the boutique. It excludes customer delivery, payment fees, selling labor, rent, and taxes. Real accounting treatment depends on the business's applicable framework and cost policy; agree that treatment with the responsible bookkeeper or adviser.
Shopify's commercial landed-cost guide considers a broad delivery-cost model. The IFRS Foundation's IAS 2 summary separately describes inventory costs associated with bringing goods to their location and condition. Do not combine different definitions under an unlabeled “cost” column.
Start with an explicitly fictional shipment
Every number below is hypothetical, in US dollars, and unrelated to Rustic Jewel Co. Imagine two lines with no shortages or damaged units. Assume the stated packed weights are the chosen, documented allocation basis and that the $90 charge applies to both lines together.
| Line | Units | Purchase cost per unit | Total goods cost | Packed weight per unit |
|---|---|---|---|---|
| Brooch A | 20 | $10 | $200 | 50 g |
| Necklace B | 10 | $20 | $200 | 200 g |
The goods total is $400. There are 30 selling units, and their assumed packed weights total 3,000 g: 1,000 g for A and 2,000 g for B. With the shared $90 charge, the amount to allocate and reconcile is $490.
Compare unit and weight allocation
Allocating by units gives $90 ÷ 30 = $3 per unit. Brooch A receives $60 of the charge, and Necklace B receives $30. Their resulting unit costs are $13 and $23. The check is 20 × $13 + 10 × $23 = $490.
Allocating by the assumed packed weight gives A one-third of the charge and B two-thirds: $30 and $60. A therefore receives $1.50 per unit, while B receives $6. Their unit costs become $11.50 and $26. The check is 20 × $11.50 + 10 × $26 = $490.
Both methods allocate the full amount, but they answer different cost-driver assumptions. Weight may be suitable for a weight-driven charge; it is not automatically right for a charge based on declared value, dimensional space, or a fee attributable to only one line. A directly identifiable charge should not be spread across unrelated goods merely to simplify the table.
Keep estimates and rounding visible
If the carrier invoice is missing, label the cost provisional and retain the estimate source. Faire's shipping guidance distinguishes estimated, TBD, and confirmed shipping information. Its marketplace process is a useful reason to check the actual invoice rather than treating an earlier estimate as final.
Keep precision during allocation and use a documented rounding rule at the final line totals. Record any residual cent on a named line so allocated charges still sum to the invoice. Also check whether freight is already included in the supplier's unit price; allocating it again would double-count it.
Carry the basis into the next calculation
The ornate gold-tone cuff is a visual product example, not a source for weights, purchase costs, or freight. Those facts must come from the relevant transaction and measured shipping records.
Store the invoice reference, currency, included charges, allocation basis, quantities, precision, and provisional/final status together. Use the markup and margin guide only after the chosen unit cost is clear. This allocation does not establish selling price, demand, contribution, or net profit. Request actual product and commercial information through wholesale inquiries.