Passing scores indicate the applicant's ability to learn the work. So, be as specific as you can about the skills you want. Private employment agencies will also help in recruitment. However, the employee or the employer must pay a fee to the private agency for its services. Of course, a lot of unqualified applicants may inquire about the job, and you cannot interview an applicant and wait on a customer at the same time.
Newspaper advertisements are another source of applicants.
You can reach a large group of job seekers and you can screen them at your convenience. If you list a phone number at the store, you may end up on the phone instead of dealing with a customer. Job applicants are readily available from local schools. The local high school may have a distributive education department where the students work in your store part time while learning about selling and merchandising along with their school courses. Many part-time students stay with the store after they finish school.