When running e-commerce, we encounter an interesting paradox. I buy a product for 450 TL cost and sell it for 990 TL, which seems to have an approximate profit margin of 120%. But when I do the detailed calculations, I end up at a loss. After deducting shipping, packaging, platform commissions, advertising costs, return processes, taxes, and other expenses, the sales price is insufficient. This is the hidden side of e-commerce—high sales prices do not always mean profit.