日誌
Nick can purchase each milkshake for $2. For the first milkshake purchased Nick
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【題目】 Nick can purchase each milkshake for $2. For the first milkshake purchased Nick is willing to pay $4, for the second milkshake $3, for the third milkshake $2 and for the fourth milkshake $1. What is the value of Nick's consumer surplus?
$2
$3
$9
$10
