Helen's Cutting Station offers a new concept in haircuts; low cost and very quick. Set in a local mall, Helen's offers 15-minute haircuts for harried shoppers who do not have time for lengthy appointments. To ensure that the clients are in and out quickly, she schedules her 5 employees based on expected client traffic. Each of the employees is paid $1230 per month, with part of their pay coming from client tips. Helen pays rent and overhead costs of $2200 per month on the facility. Because of the quick nature of the service, Helen doesn't have time to clean combs in between clients, so she uses a new comb for each customer, at a cost of $0.55 each. She also provides shampoo and conditioner for each client at a cost of $1.05 per client. The average price for a haircut is $10. Helen pays herself $6000 per month. What is Helen's contribution margin ratio?

Select answer from the options below

79.2%

84.0%

5.0%

16.0%