–––NOTHING IN THIS POST IS RELEVANT TO THE GMAT EXAM–––weiw49 Wrote:Is "$10000  of  shipping costs " right???
no, although there is no way on earth that the distinction would ever be tested on this exam.
in INFORMAL usage (or where space is at a premium, e.g., newspapers), you might see something like 
$1000 of clothes and $5000 of bicycles were stolen.
in FORMAL usage, though, these would have to be re-written, e.g., 
a thousand dollars' worth of clothes and five thousand dollars' worth of bicycles.
off the top of my head, i can think of only one instance in which "$x 
of..." is correct formal usage—namely, if $x is 
a fraction of some larger monetary amount.
Marta brought $500 in spending money on her two-week vacation, but, by the end of the first day, she had already spent $200 of that money.  (note that it's $500 IN spending money, not $500 OF spending money)
Even if Larry Ellison's daughter manages to spend $10 billion of her father's money, there will still be three or four times that amount in his accounts.–––NOTHING IN THIS POST IS RELEVANT TO THE GMAT EXAM–––