Auto repair centers may be able to earn economic profit. The market supply curve of auto repair services shifts to the left. Either price or output is likely to increase, but it's impossible to say which. After firms have had time to adjust to the new equilibrium, the price of auto repair services will exceed the marginal cost. Each firm is small relative to the market.
Goods produced in the market are homogeneous.
Each firm is a price taker. There is easy entry and exit in the market. All of the following are true of a perfectly competitive firm in long-run equilibrium except one. It will be minimizing average total cost. It will be charging a price equal to marginal cost.