my bill is this:

4 pcs. item#1. $11 each = $44

10 pcs. item#2. $12 each = $120

24 pcs. item#3. $24 each = $72

2 pcs. item#4. $6 each = $12

ups charge = $37

TOTAL=$285

my question is my real bill is $248

but

i want to know how much i should add for each item since my shipping (ups) is $37!

do i divide $37 to my four items

or

$37 to all my items which are 40 items (total)

HOW DOES IT WORK? HOW DO I INSERT MY SHIPPING COST TO AN ITEM!!!!

?????