http://tinyurl.com/lk85lwh

Pay per download:
Size / Group*	1 - 50 MB	50 - 100 MB	100 - 250 MB	250 - 500 MB	500 - 1000 MB	> 1000 MB
I	            $3	             $5         	$7	     $10              $20       $40
II	            $1	             $3         	$5	     $6           	$7       $10
III	            $1	             $1         	$1.5	      $2	        $2.5       $3
IV	            $0.5	     $0.5         	$0.5	     $0.5	         $0.5     $0.5