Using a regex to separate the letters from the digits, and then sorting numerically on the digits, and finally putting back the pieces together: 
$ perl -e 'use strict;
> use warnings;
> use Data::Dumper;
>
> my @a = qw / E1180 D250 A1180 E855 E975 A130 A250 B1105 B1255 B2480 
+C1180 C1600 D1180 /;
>
> print "$_\n"
>         for map "$_->[0]$_->[1]",
>         sort { $a->[1] <=> $b->[1]}
>         map { /([A-Z]+)(\d+)/; [$1, $2]} @a;'
A130
D250
A250
E855
E975
B1105
E1180
A1180
C1180
D1180
B1255
C1600
B2480

[download]
Note that you did not specify any sort order for the letters when the digits are the same, so the items are kept in the original order in that case (see e.g. A1180, C1180 and D1180).

Update:: removed a piece a code that got accidentally pasted twice.

In reply to Re: Data with Letter(s) & Number sort query by Laurent_R
in thread Data with Letter(s) & Number sort query by merrymonk

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