I have recently put the program code for a calculator dutching program up on my freeware page. It dutchs for a target profit or a fixed bet. It allows dutching for up to 5 prices.
The calculator used is a Sharp EL-5120 hand-held programmable calculator.
I will provide my freeware web page link and leave it to the moderator to edit out if it contravenes the rules of the forum. The page does have a commercial link on it. It also has a couple of freeware programs that work off Unitab prices
videocam.net.au/koala/freeware.html
IF it fails you can email me at racetext at bigpond dot com dot au and I will send you the link.
The program tends to run a bit slow and would not be as fast as a dedicated hand-held dutching unit with its dedicated code.