Guidebook Includes – The 4 Steps to Calculate Return on Investment This book also includes FREE support . You read that right, if you're still not able to calculate ROI after reading this guide, contact us through our website at TDBNow.com or through our social media (and we'll do the calculations for you ): Although anyone can use this book to calculate return on investment, it was written specifically for business owners and entrepreneurs who want to calculate return on investment on anything that will potentially help you grow your businesses and/or increase your profits such training, advertising, outsourcing, and other such investments. About This Live your best life by taking action today.