First, clarify the question. Does it mean:
a) two facilities ... each month each, or in total?
b) If it's "each", then no problem, 15 million a month is 15 million divided by number of weeks in a month to get the number per week.
c) If it's "in total" then you have to make the assumption that the processing power of each one is equal to that of the other. Otherwise you don't know where to start. If they do have equal processing power, then divide the answer in (b) above by two.
d) You have to assume that the "Ohio smelting plants" is one of those "facilities" that's being talked about.
Is this the complete question? If so, then the book you got it out of is rubbish. Wipe yourself with it. If not, and it's been set by the teacher, reboot it.