Negative number fomrat

Hi experts,

i need you expertise in number formatting. In mapping we need to format negative as per

ex:  123,45-  need to be formatted as -00123,450 ( total length should be always 10 including - and , signs and after , 3 digits should be there

PI might receive positive numbers as wel, but only negative numbers have sign at the end.

I tried standard functions but couldn't see required output. Please help me on this

Regards,

Deep