SellMira guides

Ecommerce profit guides for better ad decisions.

Learn the unit economics behind break-even ROAS, CPA limits, refunds, and Shopify profit margin. Use these as guidance, not guarantees.

What Is Break-even ROAS?

Learn the minimum ROAS needed to avoid losing money after net revenue, variable costs, and ad spend are counted.

Understand the difference between the minimum ROAS needed to avoid losing money and the ROAS needed for your target margin.

Compare Meta Ads ROAS with net revenue, contribution margin, CPA room, refunds, and discounts.

Calculate dropshipping profit after product cost, shipping, fees, refunds, discounts, and ad spend.

Map selling price, discounts, product cost, shipping, payment fees, packaging, and refunds into contribution margin.

Find the maximum CPA an ecommerce product can afford before losing money.

See why returns and refunds can quietly reduce CPA room and raise the ROAS needed to stay profitable.

Model how confirmation rate, delivery rate, RTO shipping, COD fees, and CPA affect cash-on-delivery profit.

Check whether a price leaves enough room for variable costs, target profit, and paid traffic.

Review the cost and ad-performance leaks that can turn revenue into low-margin orders.

Start with the break-even ROAS calculator, then ask AI to review the report if anything looks unclear.