We need to print 14 copies of a 80 pages report. Thus the total number of pages that needs to be printed is:
80*14=80(10+4)=800+320=1,120 pages.
Paper is bought on reams of 500 pages, so we can buy :
1 ream, that is 500 pages,
2 reams, that is 500*2=1,000 pages
3 reams, that is 500*3=1,500 pages.
It is clear that to need to buy 3 reams, so that we have enough paper.
3 reams * $3.66 per ream = $10.98
Answer: $10.98