Andy compares mattresses. a twin-sized nightsoft mattress at the large chain buyrite costs $1,500. the buyrite saleswoman tells andy that the company's 24-hour customer service, free mattress cleaning, and 60-day return policies are the best in the business. a similar twin-sized model, the darknights mattress, at the small store joe's bed and linens, costs $1,495. the salesman at joe's tells andy that this store offers a 30-day money-back guarantee, plus free delivery. which of these is andy experiencing? non-price competition in a monopolistically competitive marketnon-price competit