My solution
Very similar solution to most of the other folk.
I'm trying to use the Cloud Native version to get a sense of the capabilities of this - since that's gotta be the future of the platform.
I used standard mode.
Oof, that was rough. The challenge itself wasn't bad but I spent awhile chasing down why I didn't match the solution in the initial post or in Josh's video - I kept thinking I was doing something wrong, built it in Designer Desktop, and even went to Excel as the tiebreaker..... it's that the solution of 14,450 is a Sampled solution, not the full solution
The POS initial csv file has 269,375 rows. However, with the sampled solution, you start with 254,750 rows. I finally figured it out when I uploaded someone else's solution, connected it with my data, and saw the 14,450 appear instead of the 15,497 that was on my screen with the exact same file, and felt like my data was messing with me.... nope, just sampled.
FYI @AYXAcademy