The Allen and Greenough is still under construction;
so some links may not work quite the way you would expect.
635. In the statement of sums of money in Roman
numerals, a line above the number indicates thousands; lines above and at
the sides also, hundred-thousands. Thus HS
DC = 600 séstertií; HS DC = 600,000 séstertií, or 600 séstertia; HS
|DC| = 60,000,000 séstertií, or 60,000 séstertia.