Game developers can define a price of an item to any amount that is not below production costs and Monetizr fee. This price is referenced as Sales Amount within app.themonetizr.com.
Sales Amount is the actual value for items that players are paying for the product. Shipping costs and taxes are separated and added on top of Sales Amount at the time of purchase if they occur. In case of product discounts Monetizr separates that into metric "Sales Amount before discounts".