Tool4seller gets all sales data and Amazon fees (referral fees, FBA fees, advertising, etc.) from Amazon API. (Source: Amazon Seller Central -Reports -Fulfillment - Sales - All Orders)
If you just listed the product and it hasn't made a sale yet, it may not be able to estimate the income and cost data. Once Amazon updates transaction details, Tool4seller will automatically correct the data.
If you've changed the product price of the pending order, Tool4seller will estimate the data based on the latest completed order on Amazon. After the pending order is completed, the data will be automatically adjusted to the accurate figures.
That's why Tool4seller's sales data is different from Amazon's.