单项选择题

Purchasing Guidelines
For lab use: Supplies must be ordered through standard procedure using the standard official form, and charged to an active university account number.
For office use: Certain supplies are kept in stock in the department and can be picked up on an as-needed basis from the supply officE.The standard official form. is not required for these items unless they are intended for lab usE.
These are the in-stock items:
pens, pencils
paper clips/binding clips
Post-It notes, yellow, several sizes
lined note pads, yellow or white, two sizes: 5'x8' and 8.5'xll'
hanging file folders, dark green
rolls of scotch tape (dispenser refills)
overhead projector markers
correction fluid
If what you need is not on this list, other supplies can be ordered from Corporate Express Co.
As Northern University's preferred office supply vendor, Corporate Express Co. stocks an extensive list of items for next-day or second-day delivery.
To find the items you need, borrow their catalog from Carol Sera in the supply officE.
The prices listed in the catalog are usually discounted up to 45%.
For items that are not in stock or are not available from Corporate Express, catalogs from other recommended NU Supply Vendors are availablE.The ordering procedure is the same as abovE.
All purchases made for NU purposes are tax-exempt; most vendors will not charge sales tax if you present them with a copy of the State Tax Exemption Letter at the time of purchasE.If you do pay sales tax, it is not reimbursable in most cases.
The State Tax Exemption Letter must be obtained from Denies Brian.
Note: This letter may be used only for purchases intended for university usE.Nil's tax exemption is not for personal use by individuals, faculty, staff, or students.
When should the standard official form. be submitted?
A.When faculty members want to purchase office supplies
B.When staff members need supplies for lab use
C.When employees need pencils for their offices
D.When stocks are low