Your way is 22.44 a  acre.

 I dought if that is right, I'm thinking  $22 acre for upto 20 bu per acre & another $.22 a bu over 20 bu to the combine & $.22 a bu to haul.

 50 Bu wheat

 $22 cut

 $6.60 to harvest the 30 bu over  the 20 bu

 $11 trucking the 50 bu

 $39.60 cost to take 50 bu per acre from the field to the bin.

 20 bu wheat would have a harvest cost of

 $22 Cut

 $4.40 Trucking the 20 bu

 $26.40 cost to take 20 bu per acre from field to bin.