Here is the Answer to the eviction lawsuit. Although it is what the Summons says you need to file within 5 days, it usually comes AFTER the other papers, like a motion to quash and demurrer to the Complaint.
The essence of the Answer is to respond to the numbered statements in the Complaint and to bring up Affirmative Defenses, such as uninhabitable conditions, repair and deduct, illegal late fees, retaliation, and so forth.
The amount you pay here is to have the Answer prepared, which will involve a brief discussion with the attorney about the grounds for your Answer.