I think it will solve your problem .Just follow the steps given below.
Let's say that your data is in A1:A8. Follow these steps:
1) If column B is not empty, create a new, blank column at B.
2) In B1, enter the following formula:
=MID(A1,SEARCH("@",A1)+1,LEN(A1))
3) Copy this formula down to B8.
You now have a column where all the timber lengths are extracted. At this point, you can sort both A and B together by using B as the sort key.
CSV stands for "comma-separated values." It's a file format that is used for interfacing with other types of programs.