More than $600,000 in cash and services are up for grabs in “Innovations 4 Entrepreneurs,” a national essay contest aimed at tech-savvy entrepreneurs and sponsored by Comcast Business, a unit of Comcast Cable, and Inc. magazine. Two winning essays from each of the 16 Comcast Business Regions, including Kansas City, will be picked—one with the topic of “best use of technology to enhance the customer experience” and one with the…