The maximum possible increase in the money supply given the reserve requirement and the excess reserves is $4,742.55.
The first step is to determine the total amount deposited in the bank.
Amount deposited = excess reserve / (1 - required reserve)
$700 / (1 - 0.18)
$700 / 0.82 = $853.66
The maximum possible increase in the money supply = $853.66 / 0.18 = $4,742.55
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