Xavier produces and sells tomatoes in a purely competitive market. This implies that Xavier's marginal revenue from an extra unit of tomatoes is always equal to the

A) unit price.
B) average cost.
C) variable cost.
D) unit profit.

Marginal Revenue

The additional revenue generated from selling one more unit of a good or service; crucial for determining the optimal level of output for profit maximization.

Purely Competitive Market

A market structure characterized by many buyers and sellers, homogeneous products, and the ease of entering and exiting the market.

Unit Price

The cost per unit of volume or weight of a product, allowing for easier comparison of costs between different sized packages of the same item.