NICNT18 upgrade to NICNT19 is $149.00
This upgrade " adds new updated volumes on Romans, Galatians, Colossians, and Philemon".
If I buy these books separately, the sale prices are: $63.90, $43.90, $43.90, and $19.90 (total of $171.60)
If I use the discount code NIC-50-19 with the List Prices, I get: $40.00, $27.50, $27.50, and $12.50 (total of $107.50).
What is the advantage of paying the $41.50 extra to upgrade the whole set rather than saving that amount and just buying the 4 new volumes separately with the NIC-50-19 code?
Is it also cheaper to buy individual items than to bulk upgrade the NICOT?