left
left2

250 100%
250
r2c2 r2c3
r3c1 r3c2 r3c3

col 25%
col 60%
dd
dd
col 15%

col 250
col w= parent - (w1+w3)
dd
dd
col 250

col 33% Here is some copy for each column, show 3 columns on large, show one on med and small
col 33% Here is some copy for each column, show 3 columns on large, show one on med and small
dd dd
col 33% Here is some copy for each column, height AUTO
show 3 columns on large
, show one on med and small

after 3 divs