A nurse is preparing to administer clindamycin by intermittent IV bolus over 30 minutes to a client who has a staphylococcal infection. Available is 300 mg clindamycin premixed in 50 mL 0.9% sodium chloride (NaCl). The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)