For a PA-7050, you will need the following

• 1 x PAN-PA-7050-AC-SYS - PA-7050 Base AC Hardware Bundle.
• 1 x PAN-PA-7050-SMC-B-SYS-UPG - PA-7050, Switch Management Card upgrade
• 1 x PAN-PA-7000-LFC-A-SYS-UPG - PA-7000, Log Forwarding Card upgrade
• (1-6) x PAN-PA-7000-100G-NPC-A - PA-7000, Network Processing Card
• (1-6) x PAN-PA-7000-BLNK-OSF - PA-7000 Blank card, on site FRU

For the PA-7050, you can also add the following which makes the airflow the same as a PA-7080.

• 1 x PAN-AIRDUCT - Passive air duct to redirect air flow changing from side to side to front to rear, requires 14RU of rack space.

Remember, support and subscriptions are per chassis. The number of network cards uses is irrelevant.