With some tinkering around in Tables and Cos menu I might have figured it out. Image instructions follow:
Start:
![jthi_9-1620075325174.png jthi_9-1620075325174.png](https://community.jmp.com/t5/image/serverpage/image-id/32563i116B9BCC33689CC8/image-size/medium?v=v2&px=400)
1. Tables / Split
![jthi_0-1620074836053.png jthi_0-1620074836053.png](https://community.jmp.com/t5/image/serverpage/image-id/32554i91A71F88AB4897D3/image-size/medium?v=v2&px=400)
![jthi_1-1620074840856.png jthi_1-1620074840856.png](https://community.jmp.com/t5/image/serverpage/image-id/32555iB0BA4D58C1BBB819/image-size/medium?v=v2&px=400)
2. With A, B and C columns selected go to Cols / Utilities / Combine Columns(might want to keep Multiple Response, depending how you use the data)
![jthi_2-1620074903104.png jthi_2-1620074903104.png](https://community.jmp.com/t5/image/serverpage/image-id/32556i856C9C8DFD4C6DC6/image-size/medium?v=v2&px=400)
![jthi_3-1620075040598.png jthi_3-1620075040598.png](https://community.jmp.com/t5/image/serverpage/image-id/32557iF7ABBB7E72CB6E37/image-size/medium?v=v2&px=400)
3. Delete unnecessary colums A, B, C
4. To go back, select Market column and go to Cols / Utilities / Text To Columns
![jthi_4-1620075111328.png jthi_4-1620075111328.png](https://community.jmp.com/t5/image/serverpage/image-id/32558iBB86ED8F8E930148/image-size/medium?v=v2&px=400)
![jthi_5-1620075117414.png jthi_5-1620075117414.png](https://community.jmp.com/t5/image/serverpage/image-id/32559iA0DE9FA3DC3E8C84/image-size/medium?v=v2&px=400)
5. Tables / Stack
![jthi_6-1620075133355.png jthi_6-1620075133355.png](https://community.jmp.com/t5/image/serverpage/image-id/32560iF1A8057CE81911F1/image-size/medium?v=v2&px=400)
![jthi_7-1620075143034.png jthi_7-1620075143034.png](https://community.jmp.com/t5/image/serverpage/image-id/32561i78A7581D9A5A6DF3/image-size/medium?v=v2&px=400)
6. Delete Label column
![jthi_8-1620075165912.png jthi_8-1620075165912.png](https://community.jmp.com/t5/image/serverpage/image-id/32562iF4DD0890D6171103/image-size/medium?v=v2&px=400)
-Jarmo