It's important that you sell all the horses in the box and you may need to twist arms to get rid of them all depending on the size of your office! Once you've got rid of all the horses you can sit back and enjoy the race. You can divide up the prize money anyway you like, just make people aware of the prizes before you sell them a horses name.
We suggest a good way to split the prize money is 50% for the person with the winning horse, 25% for the second place, 15% for 3rd place and 10% for 4th place e.g. 40 horses at £2 each = £ 80. Prize money is 1st place £40, 2nd place £20, 3rd place £12 and 4th place £8.
You could also decide to donate a portion of the money raised to a local charity or good cause. The Injured Jockeys Fund would be a great charity to choose.