First, format the stationing so that it is read as a whole number as seen below (not 10+00, etc). Next adjust the column width of the stationing column to 5:
Left justify both the stationing and elevation columns so the output will format correctly in the txt file you will output:
Save the file as a space delimited file (*.PRN). After that, rename the *.PRN file with a *.TXT file extension so that AutoCAD can import it:
Select the appropriate alignment, style, name, and layer for your profile:
You're Done.