the interest rate is .6 percent, what formula/how to solve this

5-48 An elderly lady decided to distribute most of her con- siderable wealth to charity and to keep for herself only enough money to provide for her living. She feels that $4500 a month will amply provide for her needs. She will establish a trust fund at a bank that pays .6% interest, compounded monthly. Upon her death, the balance is to be paid to her niece, Susan. If she deposits enough money to last forever, how much will Susan receive when her aunt dies