What this is
The 30th BOX pack count is implied (box price ÷ pack price), not stated: assumption C that the box holds whole packs at list. Promos are where TPC prices a guaranteed specific card: as a list-price surcharge on a bundle.
Where it comes from
Our calculation from other figures in the trainer’s notes.
Show the working
- 1980/(8x180)=1.375, +540
- 1200/(2x360)=1.667, +480
- 7200/360=20