Can customer service reps be considered exempt employees?

Q. We are an independent insurance agency. All of our employees are on salary or salary plus commission. A number of the salaried employees are customer service reps. They process renewals, cancellations, claims, etc. They are licensed by the state and are required to get CPE credits to keep their licenses. Is this enough of a case to make them exempt employees? We do occasionally make pay adjustments based on an hourly rate, i.e. unpaid time off and overtime for extra time worked. – KSL, Wisconsin