I want Shopify store but analyze: can Shopify stores actually profit? Map Shopify costs: subscription, apps, payment processing, advertising. Calculate: product cost + Shopify costs + ads = total cost vs. sale price. Show me the Shopify math: these costs eat into profit significantly. Give me the profitability assessment: need this margin to actually profit. Include: what Shopify actually costs monthly, whether profit is possible, and what margins are needed.