In the Teens Guide to Mastering Sales, we will show you how you need to think to become a master at selling. Your ability to sell, persuade, or convince others is a critical key to having success in business or life. At first, we will be discussing what exactly selling is and what you need to know to become better at it. Then we will be covering tips and strategies to make the sales process easier for you. Lastly, we will show you exactly...