Apple: Additional TSIs are available for purchase in either a 2-pack for 99 USD or 5-Pack for 249 USD (or in local currency where available) in the Code-Level Support section of your account. TSIs purchased separately expire one year from the date of activation.
Seems like you save a few pennies per incident with two packs unless you really need an odd number.
Seems like you save a few pennies per incident with two packs unless you really need an odd number.