A school is planning a field trip and needs to arrange transportation. The cost of a charter bus is given by the equation:

$$ C = 200 + 10n $$

where:

• $$ C $$ is the total cost in dollars.
• $$ n $$ is the number of students attending.

If the school has a budget of $$ 600 $$ for transportation, what is the maximum number of students that can attend the field trip, based on the cost formula?