Are you seriously asking this or just trolling?
How many grams of sugar in coke? How long will it take you to burn if those grams of sugar? Do the math and stop trolling. Better yet try it and let us know the results.
Little to none, it breaks the fast but only for as long as it takes to burn the 120 calories. Provided you’re not trying to integrate a mid day coke into every fast, It’s not gonna make you sick or slow you down that much. If you’re craving a coke then live your life.