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I was skeptical the answer was correct for a while.. .. then I got the answer. Nice, tricky challenge!
I realize I didn't do this in the most efficient way - but it works and is easy enough (for my brain) to follow.
Spoiler
My first strategy involved making a master table with all the sources combined and then filtering from there. However, I kept getting hung up where records were falling out on the L/R of my joins that concerned me.
So I started over and decided to isolate the Taj Majal set first (step 1), and then do all my comparisons to that (step 2 &3). The summarize tool includes version number which gets around the problem some people were experiencing when this challenge first came out.
I noticed if you include the spares that come with the Taj Majal set in the inventory in step 1 (while still excluding spares in step 2), then there are enough parts for two additional sets in the final output.
So I started over and decided to isolate the Taj Majal set first (step 1), and then do all my comparisons to that (step 2 &3). The summarize tool includes version number which gets around the problem some people were experiencing when this challenge first came out.
I noticed if you include the spares that come with the Taj Majal set in the inventory in step 1 (while still excluding spares in step 2), then there are enough parts for two additional sets in the final output.
My youngest son LOVES Legos so I might have to reference this for my own personal use! Thanks @Qiu!
