Move catalogue and sales data in and out as CSV.
Products
SKU, name, category, price and current stock.
Orders
Every order with its totals, channel and coupon.
Customers
Contact details, lifetime value and source.
Inventory
Every batch with its supplier and cost.
Suppliers
Contacts, units supplied and total spend.
Campaigns
Spend, orders, revenue and return per campaign.
Revenue report
Day by day, with cost and margin.
Rows are matched on SKU: an existing SKU is updated, a new one is created as a draft. A spreadsheet row is not a decision to publish.