On: When can a comma cost you $2 million?

[ars]

Isn't there some rule, that if there is a dispute in the contract, whoever wrote it gets the "less beneficial" interpretation?

[grellas → ars]

Yes, in the case of ambiguity in meaning, the rule (when applied) states that such ambiguities are construed against the drafting party.

[jvdh → ars]

I would think that if the prices are not set in the contract, and the prices are subsequently raised each year, then you're changing the terms of the contract. IANAL, but I would think that that entitles you to get out of the contract.