I have the following expression in a Formula field which i would like outputting as a Currency or a number to 2 decimal places

input.Pound + input.Fifty + input.Twenty + input.Ten + input.Five + 25

i have tried the following but it only outputs to 1 result is 57.0

(input.Pound + input.Fifty + input.Twenty + input.Ten + input.Five + 25).round(2)

it is possible to do in the expression or does this have to be a deluge script?