This example uses FDELETE to delete an empty directory to which you have write access. If the directory is not empty, the optional SYSMSG function returns an error message stating that SAS is unable to delete the file.
Costcoâs business model is called a subscription business model â customers who want to shop at the store must buy a membership (currently $55 in the U.S.) with the promise of lower prices to make up for the initial upfront cost.
1 Typically, representatives of Costco will visit affiliate companies to sign up new members who must pay full price for the membership but will receive in turn a gift card for up to $20 as a gift.  Costco Association Discount â As a member of some professional organizations, you may be entitled to a special discount.