TS,

That's not how you do it. Not if you want an accurate guide anyway.

Do you want to price the whole field or just the main chances. To get a simple accurate guide, I personally think you should probably delete the lower rated runners because their ratings can sometimes throw the others out of whack. I think you could look at only the top half of the ratings. In other words, in a field of 13 as you have, you could look at just the top 7 rated runners and delete the rest.

94.3
80.1
62
88.2
72.8
75.6
84.2
72
86.2
77.6
89.5
80.7
60.6

so, now, you're left with:

94.3
80.1
88.2
84.2
86.2
89.5
80.7

Now, here's the important part. A nice easy way of pricing them from here on is to change the lowest rating (80.1) to ONE, and then work all the rest out from there. So to do that, you'd simply subtract 79.1 from all the other ratings:

94.3 - 79.1 = 15.2
80.1 - 79.1 = 1.0
88.2 - 79.1 = 9.1
84.2 - 79.1 = 5.1
86.2 - 79.1 = 7.1
89.5 - 79.1 = 10.4
80.7 - 79.1 = 1.6

NOW, you add up the total of these new ratings, in this case 49.5 and multiply that by 1.2 (to take into account the other runners in the race). That leaves you with 59.4. You now divide 59.4 by each horse's new rating and there you have it:

59.4/15.2 = $3.90
59.4/1.0 = $59.40
59.4/9.1 = $6.50
59.4/5.1 = $11.65
59.4/7.1 = $8.35
59.4/10.4 = $5.70
59.4/1.6 = $37.10

By the way, I have one question. Do you usually do ratings and is that gap of 4.8 between top and 2nd top rated normal, or is it larger than normal???