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Fundamentalsbeginner5 lessons · ~32 min total

Business Math Basics for Online Sellers

Most online sellers stall because they confuse revenue with profit, ignore break-even, or forget cash flow. This short course fixes that. Each lesson teaches one number, the formula behind it, and how it changes the decisions you make about pricing, ads, and inventory.

Lessons

  1. 1Revenue vs ProfitWhy a $10,000 sales month can still leave you broke — and how to separate top-line revenue from real profit.~6 min
  2. 2Profit MarginTurn raw profit into a percentage you can compare across products, months, and platforms.~6 min
  3. 3Break-even PointHow many units you must sell before a product, an ad campaign, or a whole shop stops losing money.~7 min
  4. 4ROI (Return on Investment)The right way to judge ads, inventory buys, and tool subscriptions — without fooling yourself.~6 min
  5. 5Cash Flow BasicsWhy profitable shops still run out of money — and the simple weekly habit that prevents it.~7 min
  • How To Calculate Handmade Business Profit

    Work out what your handmade business actually keeps after materials, labor, packaging, shipping, fees, and taxes.

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  • What Is A Good Print-on-Demand Profit Margin? Complete POD Profit Margin Guide (2026)

    What a good POD profit margin looks like in 2026 — gross vs net margin, every POD cost, formulas, worked t-shirt/hoodie/mug/poster/tote examples, pricing tables, and common mistakes.

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  • What Is a Good Profit Margin?

    What counts as a healthy profit margin — and how it changes depending on what you sell and where.

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  • What Is A Good Profit Margin? Complete Small Business Profit Margin Guide

    A 2026 profit margin guide — gross vs net vs contribution, what counts as a good margin, healthy benchmarks by industry and platform, formulas, and improvement strategies.

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  • Seller Profit Workbook

    Track revenue, expenses, fees, profit margins, break-even points, and product performance across any online selling business.

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  • TikTok Shop Profit Worksheet

    A beginner-friendly worksheet for estimating TikTok Shop fees, costs, and profit per product — plus monthly sales targets and break-even checks.

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  • Break-Even Planning Worksheet

    Calculate break-even points, profit cushions, and sales targets across any selling platform.

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  • Content Marketing Planner

    Plan blog posts, videos, and social content with a structured editorial calendar designed to drive traffic and sales for online sellers.

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  • Profit Margin Calculator

    Universal profit, margin, and markup for any product or channel.

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  • Break-Even Calculator

    Sales needed to cover your startup costs.

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  • Amazon KDP vs IngramSpark Profit Calculator

    Side-by-side royalty and monthly profit on KDP vs IngramSpark.

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  • Email Marketing ROI Calculator

    Estimate revenue, profit, and ROI from email marketing campaigns.

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