Learn and apply
Understand the decision—not only the number.
Margin versus markup
Why these percentages answer different questions.
Finding break-even
Understand fixed cost, variable cost and contribution.
Billable hours
Why working hours and billable hours are not the same.
Pricing after fees
Protect margin from marketplace and payment charges.
ROAS is not profit
Advertising return excludes many fulfilment costs.
Startup runway
Plan setup costs and early operating cash.