Direct & Inverse Proportions

The students of Anju’s class sold posters to raise money. Anju wanted
to create a ratio for finding the amount of money her class would
make for different numbers of posters sold. She knew they could
raise Rs 250 for every 60 posters sold.
(a) How much money would Anju’s class make for selling 102
posters?
(b) Could Anju’s class raise exactly Rs 2,000? If so, how many
posters would they need to sell? If not, why?