There is no place to input cost of an option on a product.. Please consider adding that as a field to the next verison. Preferably it would be a stated value and not a modifier as the selling price is.
Just a field that labeled cost, and an input of whatever the cost for the item is.
eg. base item 1 lb price 10.00 cost 5.00
option item 2 lb modifier +$7 cost 8.50 (not a modifier, but a flat cost figure)
Thanks
Lee