Attached is the Excel workbook I use for multiple Bet calculations. As well as the normal Dutch booking calcs there are alternate tabs for dutching with 1 or 2 horses as savers. The "Good Bet/Bad Bet" cells can be modified to suit the user's ideas on minimum returns.
Also there is a sheet to calculate Market percentages based on input prices as well as re-calculating the market to 100% or whatever % you like.

Dutching calculator
 

Shaun, just seen your dutching calculator.
I'm writting my own small version, I can work most of it out, but I now want to calculate the amount to bet from the profit. ie I want to input the Profit amount - say £20 and calculate back. Can you help me with this?
Regards,
Mark.

I have uploaded an unprotected sheet so you can see the formulas....let me know if you need any more help

I just wanted to say that for as many times i have bagged this site for censorship and some of the members that use this forum.

It is still by far the best forum on the internet for just about any punting information that you need.

I had a computer crash a few years back and lost all information including all excel sheets i had created or tested, but thanks to the search section on here i have found a lot of lost info such as this dutching sheet i wrote up a few years ago with formulas intact.