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$3.99 Original price was: $3.99.$1.00Current price is: $1.00.
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$43.95 Original price was: $43.95.$13.19Current price is: $13.19.
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$67.95 Original price was: $67.95.$24.99Current price is: $24.99.
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$34.95 Original price was: $34.95.$10.49Current price is: $10.49.
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$179.00 Original price was: $179.00.$24.99Current price is: $24.99.
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![[Pi – Sigma] 1st Edition](https://covers.vitalsource.com/vbid/9783110193800.jpg "[Pi – Sigma] 1st Edition")
