20. Grace invested in bonds of the International Falls Corporation. She purchased the bonds on March 1, 2018, when the price was $1,100 per bond. Over the next 12 months, International Falls paid interest at the coupon rate of 7%. On March 1, 2019, the value of the bonds was $1,080.00 per bond. Inflation was at a rate of 2%. Calculate the real rate of return of Grace's investment