         Sentence 1: It -will cost about $  20/000" per eight-week course: of:  treatinent .,- comparable: -to'-.other  injectéd. ‘cancer; therapiés ~,:-.a  Spokeswoman’ said.    Sentence 2: It..will..cost about $  20,009... -per “average “course”. .of  treatment -16.t0-17 weeks.    