#ecommerce
Practical guides for online sellers: product photos, marketplace listings, video ads and growing your store.
How to Calculate Customer Acquisition Cost (2026): CAC Formula and Examples
The CAC formula with a worked monthly example, blended vs paid CAC, how CAC relates to ROAS, how to compare it with lifetime value, and examples for small online shops.
Break-Even ROAS (2026): Formula and Examples With Fees and Shipping
The break-even ROAS formula, a full example with marketplace fees, payment processing and shipping, how returns and order size change it, and how to set a target ROAS for profit.
Black and White Product Photography (2026): When It Sells and When It Hurts
Which products look better in monochrome, why main images should stay in color, how to light and convert for black and white, and where monochrome works in your store and ads.
How to Make AI Product Images Look Realistic (2026): 8 Fixes and a Checklist
The eight things that make AI product images look fake, from light direction to uncanny props, with a fix for each, a prompt template and a checklist to run on every image.
How to Calculate Profit Margin (2026): Formula and Examples for Online Sellers
Gross and net margin formulas, a per-unit example with shipping, ads and marketplace fees, monthly net margin, and the formula for pricing to a target margin.
Markup vs Margin: The Difference, Formulas and Conversion Table (2026)
Why a 50% markup is only a 33.3% margin: the formulas, a conversion table, worked pricing examples, and the mistakes that quietly cut your profit.
How to Calculate Discount Percentage (2026): Formulas, Stacked Discounts and Examples
The discount percentage formula both ways, how stacked discounts really add up, what buy-one-get-one is worth, and how deep a Black Friday sale can go before it loses money.
How to Calculate Dimensional Weight (2026): Formula, Divisors and Examples
The dimensional weight formula, each carrier's divisor after the July 2026 USPS change, rounding rules, billable weight examples with the math, and ways to pay for less air.
AI Product Photos vs Real Photos (2026): When Each Wins and the Hybrid Workflow
Real photos for the product, AI for the setting. A side-by-side comparison, the returns risk of fully generated images, and a hybrid workflow that keeps listings accurate.
AI Tools for Shopify Stores (2026): Sidekick, Product Photos, Descriptions, Email and Chat
Shopify's built-in AI, from Sidekick to description and background tools, when an app is worth it for photos, email and chat, and how to choose apps safely.
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