I Don't Know My Real Profit
You sell 50 units of a product per month. Your spreadsheet says $12 profit per unit. But you haven't factored in Amazon's 15% fee, the $0.80 shipping cost per order, the hour you spent repricing. Real profit is $6. How many of your top sellers are actually running at a loss?
Financial painWithout real cost visibility (COGS + marketplace fees + shipping), you follow generic "25% margin" rules that work for someone else, not you.
