That's assuming no cost for parking which is a correct assumption if you are commuting from a suburban house to a suburban office park. But if you are commutin

That's assuming no cost for parking which is a correct assumption if you are commuting from a suburban house to a suburban office park. But if you are commuting from a SF/NYC apartment to a SF/NYC downtown office and you want parking in both places then its safe to add a cost of $150 per month for each which is about $3600 for parking. Its all about context.