Enigma 1164: Triple count
From New Scientist #2320, 8th December 2001 [link]
I call the number 25 “straight” because when written in words with capital letters it uses only straight lines. In fact, when written in simple capitals, it uses 29 line segments (including the hyphen), 11 of which are horizontal; also it has 10 letters. On the other hand 18 is not straight because it uses a curved G.
I have now written down three straight numbers in words with simple capitals. The first of the numbers is within 1 of the total number of line segments in the three numbers. The second on the numbers is within 1 of the total number of horizontal line segments in the three numbers. And the third of the numbers is within 1 of the total number of letters in the three numbers.
What are the three numbers?