For those of you who want the numerics...If you assign the scores: 1st place=9 pts, 2nd place = 8 pts, etc. down to 9th place = 1 pt.
Harry and 3 others were tied for 4th place. So that gives Harry et al (6+5+4+3)/4 = 4.5 points for each. Jerry was alone in 8th (2 pts), Emmitt alone in 9th (1 pt).
Since Harry was last, he most likely got the lowest audience vote (again, 9pts for 1st, 8 pts for 2nd, down to 1 pt for 9th - and also assuming no ties in the audience vote). So Harry's total was (4.5+1) = 5.5 points for his overall score.
Since Jerry was in the bottom two but above Harry, Jerry had to have exactly 4 points (6th place) in the audience vote. Total (2+4) = 6 points for his overall score.
Emmitt was in last place after the judges, but escaped the bottom two, so he had to have more than Jerry's 6 points, so Emmitt had to have at least 6 points (4th place or better) in the audience vote. Total (1+at least 6) = at least 7 points for his overall score.
Maximum score - finishing first in both judges and audience vote is 18 points. Since there was a tie for 1st, max judges points was 8.5 - so the total maximum combined score this week was (8.5+9) = 17.5 points.
I may be over simplifying things, but sometimes the math can be confusing.