In beyers book you can work out the cost of a length like this
Six furlong time of 1:12 3’5s= 363 fifths 1 fifth of a second is
1/363 = .28% of the entire race you can move the decimal point so a
lenght @ six furlongs would be worth 2.8 but this could vary from
course to course slightly as the std time for each course is
different do the same for all the distances and you could end up
with something like the following:-
5f =3.5
6f = 2.8
7f = 2.3
1mile = 2
so on and so forth
hope this helps
John