The governor may be an explicit commercial scenario:
Or the Cost may be specified as an adjunct with a non-commerical governor:
Cost is specifically about payment requested in exchange for goods or services (including income and revenue). If an amount of money is simply treated as property given, acquired, or possessed, then Possession is appropriate:
An amount (typically of money) that is linked to an item or service that it pays for/could pay for, or given as the amount earned or owed.