If it is estimated that a bank has a 30 percent chance of a liquidity deficit of $1,900 million, a 20 percent chance of a liquidity deficit of $900 million, a 20 percent chance of a liquidity surplus of $600 million and a 30 percent chance of a liquidity surplus of $1,600 million over the next week.

Caclualte the bank's expected liquidity deficit or surplus over the next week?

$150 million liquidity surplus

$800 million liquidity surplus

$150 million liquidity deficit

$300 million liquidity surplus