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