The current or target selling price of your product.
The total landed cost of your product including manufacturing, shipping, and import taxes.
The total amount paid in fees to Amazon for each sale. Include referral and fulfillment fees.
Your desired profit margin percentage after all expenses and advertising.
The ACOS you need to achieve to break even with your Amazon ads.
The ad spend % to aim for in order to achieve your target profit margin.
The average profit per unit sold at your target margin.