Hannah and Mark are both purchased memberships at different gyms. Hannah started working out at Planet Fitness. She paid $80.00 to sign up and pays $15.00 a month for her membership. Nolan started at Anytime Fitness. He paid $115.00 to sign up and only pays $12.50 a month for his membership. After how many months at these gyms, will both Hannah and Mark have spent the same amount for their memberships?