A training facility needs to purchase 50 Binders from a local office supply store. The price for the binders is $20 eac. What is the preferred method...

A training facility needs to purchase 50 Binders from a local office supply store. The price for the binders is $20 eac. What is the preferred method of Purchase?

a. the gov't wide commercial purchase card

b. written purchase order

c. SF 44

d. cash