Total sales
All sales in a marketplace — advertised and organic. Required to compute true TACOS.
Amazon's advertising reports contain only ad-attributed revenue. Organic sales live in Seller Central, on a different report, with a different shape.
To calculate TACOS honestly, AutoPPC needs you to supply total sales per marketplace. It will not estimate the number, and it will never substitute ad sales and call the result TACOS. A guessed denominator produces a metric that looks precise and is wrong.