send mail with UPLOAD and DOWNLOAD traffic

:local traf;
/queue simple
:set traf [get [find target-addresses=(“1.1.1.1” . $i)] total-bytes]
:if ($traf > 1048576) do = { /tool e-mail send to=test@test.test subject=“traffic info” body=("
You have,
UPLOAD / DOWNLOAD = " . [get [find target-addresses=(“1.1.1.1” . $i)] bytes] . " Bytes.
)
}

With this script I receive:

You have,
UPLOAD / DOWNLOAD = ,422561781/587954150,Bytes.

Can I receive traffic in MBytes, separate upload from download ?
somethig like this:

UPLOAD = ,402,MBytes.
DOWNLOAD = ,560,MBytes.

also can I removed this comma ?