A sinking fund is set up so that level annual payments will
accumulate, at i %p.a compounding annually, to $50,000 in 10 years.
Assuming the payments made are at each year-end, after exactly 5
years the sinking fund will be: [Note: a sinking fund allows for
money to be set aside by periodical deposits in order to accumalte
an amout to e.g replace equipment or repay debt due at a future
date]