Nuts- shelled or not?

[lovingmomof2]

I tried looking it up on-line, but couldn't find any info.  I am wanting to know how many nuts you get out of say 1lb of in shell nuts.  Like if I buy 1lb of pecans in the shell how many pecan meats will I get.  I am trying to figure out which would be cheaper for me to do.

[DHW]

I found this on equivalent measures/food yields (from http://extension.missouri.edu/explore/miscpubs/mp0563_01.htm):

Nuts, almonds, in shell
1 pound equals 1 to 1-3/4 cups nutmeats

Nuts, almonds, shelled
1 pound equals 3 cups blanched whole

Nuts, English walnuts, in shell
1 pound 1-2/3 cups halves

Nuts, English walnuts shelled
1 pound equals 4-1/2 cups halves or 3-2/3 cups chopped

Nuts, filberts, in shell
1 pound equals 1-1/2 cups nutmeats

Nuts, filberts, shelled
1 pound, equals 3-1/4 to 3-1/2 cups nutmeats

Nuts, peanuts, in shell
1 pound equals 2 to 2-1/4 cups nutmeats

Nuts, peanuts, shelled
1 pound equals 3 to 3-1/4 cups nutmeats

Nuts, pecans, in shell
1 pound equals 2-1/4 cups nutmeats

Nuts, pecans, shelled
1 pound equals 4 to 4-1/2 cups halves or 3 to 3-3/4 cups chopped

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For pecans, you need about 2 lbs in the shell to get 1 lb of nutmeats.
For peanuts, you need about 1 1/2 lbs in the shell to get 1 lb of nutmeats.