@Ken4155....Nothing wrong with my electronic calculator. It's the batteries in my head which are failing; and, unfortunately, can't be replaced.
Your calculation is spot-on. You will realise that I failed to take into account the initial stakes in each instance being returned for the subsequent bet and did a simple multiplication...16 x 18 x 9 x 6.5 = 16,848.
Anyway it's good to know that weecalf was happy with his winnings and I am also pleased that you have corrected my 'miscalculation' 'error' 'mistake' 'slip-up'..........I might as well say it.....Stupidity. :-)
Cheers...Hans. ☺☺☺