IfElse Formula to Calculate Percentage

Hello, 

I'm trying to create an ifelse function that calculates a different percentage of the Contract Price based on the State.

I tried the following, but am receiving an error of "Cannot read property 'returnType' of undefined"

 

ifElse(equal($estate_state_c),"QLD"),multiply(0.25,$contract_price_c),

ifElse(equal($estate_state_c),"NSW"),multiply(0.35,$contract_price_c),

ifElse(equal($estate_state_c),"VIC"),multiply(0.35,$contract_price_c)))

Can someone point out what I am doing wrong?

Thanks in advance!