You can use styles to ensure that the browser won't break lines there. CSS has a [white-space](http://www.w3.org/TR/2007/CR-CSS21-20070719/text.html#white-space-prop) property which does that. So

    <span style="white-space: nowrap;">43,560</span>

should work.

If you need this more often, you should probably create a CSS class for that, though.