[Noughmad]

We don't use Roman numerals for thousands, why should we do so for millions? The right way is obviously using metric prefixes, so 1k$, 1M$ and 1G$.

And don't forget that 'cents' is short for 'centidollars'.

[saraid216]

Is there a special reason the 'k' is lowercase?

[valleyer]

Well, M for mega is capitalized since m is already used by milli. And all of the SI prefixes larger than mega are also capital, I guess to denote that they're large...

All of the SI prefixes k and below are lowercase.