I believe it would be 319 as everytime you add 5 to the time it goes up 55. 55 divided by 5 equals 11. So every minute added it 11. Which would mean if we were trying to go from 275 (25 minutes) to the 29 minute mark, we would add 44. 44 plus 275 is 319. I'm not good at explanations but i believe it is 319.
