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Hello E,
thank you for your quick support! Doesn’t worked for me but after another night with google I found the solution!
$total = 0;
query_posts('category_name=' . get_option('featured-cat'));
while (have_posts()) : the_post();
$total += get_post_meta($post->ID, 'weight', true);
endwhile;
echo '<p>'.$total.'</p>';
Did the post-count for creating the final average with a seperate function I found on the net!
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