In the original game, the formula used to determine the value of goods in the summary page is the average trade price or, if no goods were traded, store offering price.
For example, if someone buys/sells 1 food at 50 and then 1 food at 25, the value of each unit of food in the summary will be 50+25/2, or 37.5. This # is then rounded up or down to the nearest integer (I dont remember which).
In the C64 version the formula calculation was nullified in round 12 and only store selling price was used to value the goods, even if people traded.
There has been much controversy about whether or not this was done as a "correction" to the Atari version. In the Atari version, it is possible for 2 players to collaborate to inflate the last round prices. Anyone can speculate for any number of reasons why there is a difference in round 12 valuation between the Atari & C64 versions of MULE, but to claim definitively that the Atari version was bugged because of this is incorrect since we do not have any official statements regarding this from the original author.
Therefore, by removing this ability from Planet MULE, or skipping round 12, you are changing the way the game played for us Atari people.
And I might remind you that the Atari version was the first, and best, version of MULE (in my opinion).
