A nurse is preparing to administer antibiotic X over 20 min. Available is antibiotic X in 50 mL of 0.9% sodium chloride (NSS). The drop factor of the manual IV tubing is 20 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt / min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)