社會福利 - 經濟

Q: There are four consumers willing to pay the following amounts
for haircuts:

Jelly: $7 Oprah: $2 Sally Jessy: $8 Montel: $5

There are four haircutting businesses with the following costs:

Firm A: $3 Firm B: $6 Firm C: $4 Firm D: $2

Each firm has the capacity to produce only one haircut.
(1)For efficiency, how many haircuts should be given?
(2)How large is the maximum possible total surplus ?

我不懂英文的意思，可否先解釋一下，謝謝

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