Stores are located with (x, y) coordinates (10, 8); (10, 28); and (28, 30). The volume of product that each moves is 1,000, 2,500, and 1,700 units respectively. Based on their location and volume, compute the location where a central distribution warehouse should be located to minimize transportation, based on center of gravity.
What is the "X" coordinate of that warehouse only, rounded to the nearest one decimal place?