Accumulating a growing future sumPersonal Finance Problem

A retirement home at Deer Trail Estates now costs $ 128,000. Inflation is expected to cause this price to increase at 7% per year over the 18 years before C. L. Donovan retires. If Donovan earns 9% on his investments, ow large must an equal, end-of-year deposit must be to provide the cash needed to buy the home 18 years from now?

Can someone help me to undersrtand the steps. i need to know it for my exam.