Supply/Demand, profit, black markets, elasticity of demand: Sam buys several items from the vending machine at $0.50 and sticks her chewed piece of gum on the coin slot, forcing the next student who wishes to use the vending machine to buy from her instead of the machine. Sam then raises the price to $2. The next student pays $2 for the bag of chips as he has no other option other than to not buy a snack at all -- illustrating relatively inelastic demand. Sam explains to Jamie that the profit is $1.50.
DVD Location: Season 6, disk 3, episode 9. 16:41-17:48
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