Your grandma invested some money 58 years ago into an account earning 2.5 % per year, compounded quarterly. She now has $17,598 in her account. How much interest did she earn on the investment? (Round to the dollar and do not include the $ sign in your answer just give the number only) Your grandma invested some money 58 years ago into an account earning 2.5 % per year, compounded quarterly. She now has $17,598 in her account. How much interest did she earn on the investment? (Round to the dollar and do not include the $ sign in your answer just give the number only)