ahh i got it .. i didnt look at 1000 PER YEAR for 5 years
therefore since its 100,000 pages, for 5 years it's 500,000 pages.
since you are given the cost in per 100 pages, you have to multiply each one by 5000 and add the cost of the printer
you get :
A: 26,159
B: 18,299
C: 20,499...