New columns in sales report

• Average order value Gross sales / order qty
• Order qty Number of orders in that period

New columns in CSV export of order history

• Gross Profit (Money value)
• Gross Profit (% value)
• Marketplace fees (if any)
• Cost price (of a single item)
• Cost of goods sold (cost price of all total items on a row)

New on/off switch to decide if your gross profit should include shipping revenue.