Split Bill Coldfusion Script UDF

function splitBill( guests, amount ) {
		var arrOwed = []; var i = 0; var splitamt = 0; var decval = 0; var randguest = 0;
		if ( !isDefined("arguments.guests") || !isNumeric(arguments.amount) || arguments.guests <= 0 )
			return ["The value you provide for guests must be a positive number greater than 0."];
		if ( !isDefined("arguments.amount") || !isNumeric(arguments.amount) || arguments.amount <= 0 )
			return ["The value you provide for amount must be a positive number greater than 0."];

		splitamt = arguments.amount / arguments.guests;
		decval = LSParseNumber( listFirst( splitamt, ".") & "." & left( listLast( splitamt, "." ), 2 ) );
		for ( i = 1; i <= arguments.guests; i++ ) {
			if ( listLen( splitamt, ".") == 1 ) {
				arrayAppend( arrOwed, splitamt );
			} else {
				arrayAppend( arrOwed, listFirst( splitamt, "." ) & "." & left( listLast( splitamt, "." ), 2 ) );
			}
		}

		if ( len( toString( reverse( fix( reverse( splitamt ) ) ) ) ) > 2 ) {
			randguest = randRange( 1, arguments.guests, "SHA1PRNG");
			arrOwed[ randguest ] = decimalFormat( decval + .01 );
		}
		;
		return arrOwed;
	}