Work out what you need to charge per item to cover your costs and hit your target profit margin.
What it costs you to acquire or produce a single unit.
Boxes, bags, labels, and other packaging materials per item.
Cost to ship a single item to the customer.
Total monthly spend on ads and marketing.
Monthly cost of your storefront, subscriptions, and tools.
Any other recurring monthly business costs not listed above.
How many units you expect to sell in a typical month.
The profit margin you want to achieve on each sale.