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My solution ..
similar to provided solution
A lengthy solution to work through this one. I definitely look forward to seeing other solutions to see if there is any simpler solutions.
Check out my solution.
I am pretty confident no one did it in that way before me :)
Mine is not a pretty or concise solution but seems to work...
Here's my solution to challenge 63.
Attached my Solution. I added a formula to calculate the total point of sales if missing. Additional Idea: could be extended to validate the data.