Guides
The concepts behind the calculators, explained with worked examples - so you can check the numbers and make the decision yourself.
3PL Pricing Explained: How to Compare Fulfillment Quotes
What each line on a 3PL price sheet means, why the cheapest pick-and-pack fee rarely wins, and a method for comparing fulfillment quotes fairly.
Break-Even ROAS and CPA: How Much Can You Spend on Ads?
How to calculate break-even ROAS, break-even CPA and a target ROAS for the profit you want, with a worked example and the Amazon ACoS equivalent.
Dimensional Weight Explained: Why Light Boxes Cost More to Ship
What dimensional weight is, how carriers use divisors and rounding to set billable weight, and practical ways to stop paying to ship air.
FBA vs FBM: How to Compare the Real Cost per Order
A fair, line-by-line way to compare Fulfillment by Amazon with fulfilling orders yourself or through a 3PL, including the costs sellers often forget.
How to Set a Free Shipping Threshold That Pays for Itself
A practical method for choosing a free shipping threshold: what it costs you, how much extra order value it must create, and how to test it.
How to Calculate Landed Cost for Imported Products
A step-by-step method for working out the true cost per unit of imported stock: valuation basis, duty, import VAT, fees and allocation across products.
Importing from China to the US or UK: How Duty and Import VAT Work
How customs duty and import VAT are worked out when you import products from China into the US or UK: tariff codes, customs value, Incoterms and extra duties.
How to Lower Parcel Shipping Costs Without Switching Carrier
Practical ways to reduce what you pay per parcel: billable weight, surcharges, service choice, insurance and how you charge customers for shipping.
Margin vs Markup vs Contribution Profit for Online Stores
Clear definitions of markup, gross margin and contribution profit, how to convert between them, and why break-even ad spend depends on contribution.
How to Calculate Your True Shipping Cost per Order
Postage is only part of it. A step-by-step method for adding surcharges, packaging, labour, insurance, returns and reships to get the real shipping cost per order.