$26.$ Using chart $1$ for the following question. How many packages can be purchased on each account? You have been asked by a pharmacy purchaser whether to purchase an item on $340$B$,$ GPO, or WAC. The item, Prednisone $50$mg tablets $(00055-0018-20)$ is supplied as a $100$ tablet unit dose pack $(1$x$100).$ You have purchased this item in the past. After reviewing of you split billing software for Prednisone $50$mg tablets, you have the following information:

Banked GPO opportunity: $17,910$ units

Banked $340$B opportunity: $6,431$ units

a$.$ GPO $3,340$B $1$

b$.$ GPO $17,340$B $6$

c$.$ GPO $35,340$B $12$

d$.$ GPO $179,340$B $63$