* You probably want this one: *
For the basic KEM calculator Click here
The basic calculator calculates the average cost per donut for each strategy based on your KEM farm size or farming item. This is the tool recommended for all users.

For the simulation, Click here
The simulator run a user-specified number of bonus rounds to simulate an actual user. This tool exists only to verify that the basic calculator matches actual in-game results. This tool should not be used except by advanced or curious users.