The P8 number is assigned sequentially from its own manual log for each transaction, not a supplier. The numbers are assigned sequentially from a separate log. P7 orders are not blanket orders. Blanket orders for items used exclusively by Operations and Maintenance are handled through Procurement, and would not be C9 contracts because the commodities would not be Stores stock items. Stores assigns a suffix to the P7nnnnn number which corresponds to the shop within Operations and Maintenance requesting the goods.
Stores notifies the supplier of the suffix.