[ic] how to access the price for options in cart

[Tim Good]

I need to loop through all items in a cart and return wither
or not 
"installed" (simple option) is selected. If it is, total the
extra
charge for installed items. I would like to display this
total in an
extra field called "install_chrg." Question: how do I access
the options
(price) for items in the cart? What is the best way to loop
through 
cart / items and total the charge for installed options?

Tim Good