Answer :
The marginal revenue for the evergreen bushes, based on the selling price by the gardening shop per bush, is c. $10.
How to find the marginal revenue?
The marginal revenue in a perfectly competitive firm is the same as the price and the average revenue. This is because firms in a perfectly competitive market do not decide their own price and instead have to sell at the price that the market dictates for them. As a result, the amount of goods sold by the sellers will all be the same price.
The fact that all sellers sell at the same price means that the following relationship is true:
Marginal revenue = Average revenue = Price
If the perfectly competitive gardening shop is therefore selling the evergreen bushes at $10 per bush, then this means that the marginal revenue is also $10 like the price.
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