function update_text() {
	var hay = getValue('hay');
	var carrots = getValue('carrots');
	var bells = getValue('bells');
	var total = 50 * bells + 30 * hay + 10 * carrots;
	hay = sprintf(pluralise('%s bushel of hay', '%s bushels of hay', hay), pretty_num(hay));
	carrots = sprintf(pluralise('%s carrot', '%s carrots', carrots), pretty_num(carrots));
	bells = sprintf(pluralise('%s shiny bell', '%s shiny bells', bells), pretty_num(bells));
	var list = sprintf(_('%s, %s, and %s'), hay, carrots, bells);
	var out = sprintf(_('You are ordering %s, at a total cost of <strong>%s</strong> gold pieces.'),
		list, pretty_num(total));
	out += ' ';
	out += _('Thank you.');
	document.getElementById('preview').innerHTML = out;
}