There are several typos.
In:
PreMarkets.sol - the contract is called PreMarktes
'Constants.sol' has EACH_TRADE_TAX_MAXINUM - should be EACH_TRADE_TAX_MAXIMUM
IPerMarkets.sol- there is no mention of perMarkets it is a PreMarkets typo
There are typos in important contract names that differ from the names used in the file name.
Typos in the code might lead to mistakes or developer confusion in the future. Difficult to test/maintain.
Manual review
Fix typos
Typos are at most informational and does not highlight a direct smart contract vulnerability
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