SECTION $2-$ REMEMBER TO SHOW ME YOUR WORK AND STEPS!!!

A shopping center landlord currently rents out $250,000$ sq$.ft.$ of space at $$25$ per sq$.ft.$ They know the demand for retail space will be $190,000$ sq$.$ ft$.$ if they raise the rental rate to $$30$ and $175,000$ sq$.$ ft$.$ if they raise the rental rate to $$35.$

a$.$ What price should they charge for space if all they care about is maximizing total revenue?