Challenge #381: Average Monthly Sales with a Twist

[CSmith16]

Here it is.

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[peter_gb]

What a great challenge! I couldn't figure out a multi-row approach but here are two other logical approaches...

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[TobiasFitschen]

What a fantastic challenge! Did a multi-row approach. First one in the books :).

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[Matthias_Albert]

Yay, my first challenge!

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[elaineyuan]

It took a lot of tools, but I arrived at the answer.

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[Erin]

Submission attached. Now to look to see how everyone else solved it!

[alineruizcampos]

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[sisiralteryx]

Probably should be using other functions.. but did it with a formula. 

[SandroGerber]

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Can't upload a picture

[samihamaipady]

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