Hello dear

I know the answer is c but I do not know how we get this number can you show me the calculations

15.20 A Brazilian bond with a coupon rate of 15% at is initially priced at its face value of R$1,000. At the end of the year, the bond is selling at R$950. During the year, the exchange rate goes from R$ 1-US. $0.75 to R$ 1 = U.S.$0.85. What is the bond's total dollar return during the period? a) 15% b) 10% c) 22.67% d) 31.25%