Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Econimics 101

The two Zelco 10413 Itty Bitty Book Light Replacement Bulbs cost $16.20 plus $4.98 shipping (not eligible for free Super Saver Shipping) for a total cost of $21.18. The Itty Bitty Book Light which includes two bulbs costs $19.99 with free Super Saver Shipping. Hmmmm......Let's analyze this: $21.18 for two bulbs or $19.99 for the two bulbs plus the lamp......What did we learn in Economics 101? Of course one has to consider the inconvenience of throwing away the lamp.