When you make a special order with a $0 cost, $0 gets copied to
the sales file.
To get the sales file corrected there are 3 possibilities:
1) When you receive the merchandise at the end of logging-in the goods
there is a CrossCheck item which will remind you who is waiting for
the items and will adjust the cost in the sales file
2) You can run a utility called SOCOST (file, misc, utils, SOCOST)
3) From the sales screen highlight the item, press the left arrow to
see the options and choose Cost.