Which famous shopping event featured the launch of Wolfram Alpha Pro, the advanced computational knowledge engine, with a special 'mathematical constant' pricing strategy?

Mathematics and marketing intersect in fascinating ways, from algorithms powering recommendation systems to statistical models predicting consumer behavior. Major tech companies often launch innovative products specifically for mathematics education and professionals during key shopping events. Test your knowledge about how mathematics products are marketed and launched in today's digital marketplace.

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Pi Day (March 14th) with a $31.41 launch price
Black Friday with a $27.18 price (Euler's number)
Cyber Monday with a $16.18 price (Golden Ratio)
Prime Day with pricing at $19.97 (largest known prime year at launch)