Anna Davidson on Instagram: "This is why I’m so big on knowing your numbers before you ever list a product. In the UK, a professional Amazon seller account is £25 a month. In the US, it’s $39. That part is simple. Where people come unstuck is PROFIT. My rule of thumb has always been thirds. Around 30% on sourcing. Around 30% on Amazon fees, including the 15 percent referral fee plus pick, pack and delivery. Which leaves you aiming for 40% profit. If your numbers don’t stack up on paper, they won