The following calculations are based on the assumption that, on average:

• 2 out of every 100 visitors (2% conversion rate) to your store will place an order
• the order value will be £45
• your margin is double (2x), meaning you must charge customers twice the price you pay the supplier. £1000 product margin
• it costs you £0.35 to attract one visitor to your site. £1000 total cost

Earnings are calculated by taking sales and subtracting what is paid to both advertising and suppliers.