1 Gross margin for a coffee shop is about 85%, with operating income averaging 2.5% of net sales. 2  The labor intensive nature of the coffee shop business places a premium on friendly, high energy teams which generate about $50,000 in annual revenue per worker.
The team at Amazon helped us put together a list of the most popular products with the most user reviews. Unsurprisingly, many of the top products are made by Amazon. But there are a lot of other cool tech gadgets, from headphones to hair straighteners, that sell like crazy on the platform. Here are the best-selling gadgets from Amazon.
Here you can discover the best MP3 Player Bluetooth & FM Transmitters in Amazon Best Sellers, and find the top 100 most popular Amazon MP3 Player Bluetooth & FM Transmitters. â¹ 1  Any Department. â¹ 2  Electronics. â¹ 3  Portable Audio & Video. â¹ 4  MP3 Players & Accessories. 5  MP3 Player Accessories. 6  Armbands. 7  Batteries & Battery Packs.