We cut wheat for many years until 1994.  We charged 12_12_12 and I think the extra 12 was for bushels over 20 bu_ac. (not over 40bu_ac)  I think that triple 13's is plenty cheap and with the costs of doing bus. I sure would try for triple 14's.  Up north,(Dakotas) it gets "too cheap".  We went to Idaho instead.  Up there, on Barley and irr. wheat, we got 24$_ac for the mach.  Hauling was on top.  For windrow, it was 2$_ac. more, depending on size. (We cut around 18,000ac. each year there) That .14 _bu on corn....well, I hope that hauling was extra.  Might as well leave the combines in the barn and go fishing instead.  I wouldn't pick a bu. for under .22_bu including hauling.(out to 15 miles or so.)  I'd put a 22$_ac min. on it for low yield or dryland. I'm looking for that oppertunity to "chase" the harvest again.  (am I stupid or what.  That blood still runs in my veins)  CM