This calculator by SellerTools helps you target your optimal profitability points, where you’ll break even on ad spending and hit your target profitability goal.
Use this calculator to get your break-even and target ACoS (Advertising Cost of Sale).
Amazon Advertising Guide
This Amazon Advertising Guide from the Jungle Scout blog teaches you what Amazon PPC is, the types of Amazon PPC ads, and gives you advertising strategies.
PPC Entourage is an Amazon seller software that helps automate the running and managing of an advertising campaign on Amazon. It analyzes all of your sponsored ads' data visually and optimizes them.
Sellics is a PPC management and optimization software for Amazon sellers that gives you a free PPC evaluation tool for monthly performance insights, competitive insights, ASIN-level opportunity audits, and more.