A monopolist maximizes profit by producing an output level where marginal cost equals price

The foreign exchange market is the market in which

A) the world's governments collect their tariff revenue. B) goods and services are exchanged between governments. C) the currency of one country is exchanged for the currency of another. D) all international transactions occur. E) currencies are exchanged solely by governments.

Aimee sells hand-embroidered dog apparel over the Internet. Her annual revenue is $128,000 per year, the explicit costs of her business are $42,000, and the opportunity costs of her business are $30,000. What is her accounting profit?

A) $12,000 B) $56,000 C) $86,000 D) $98,000