Splitting the 14% undecided 5-5-4 (giving the 4 to Cruz since he's not focusing on the state):
TRUMP 48%
Cruz 30%
Kasich 22%
Using these rules:
http://www.thegreenpapers.com/P16/OR-R28*(48/100) = 13.44 = 13 delegates for TRUMP
28*(30/100) = 8.4 = 8 delegates for Cruz
28*(22/100) = 6.16 = 6 delegates for Kasich
There's 1 leftover delegate, which goes to the candidate who came the closest to getting it, which is TRUMP. That gets him 14 delegates, which is 4 above the target I've set for him of 10 delegates.
http://projects.fivethirtyeight.com/election-2016/can-you-get-trump-to-1237/?ex_cid=story-twitter#IN:48,WV:23,OR:10,WA:15,CA:99,MT:27,NJ:51,NM:8