i just need to know how they got the answer its a practice question. clearly i missed a step or two.

The correct answer is shown. The board of directors authorized the issue of 500 bonds that will mature in 10 years. The face value of each bond is $1,000. The face interest rate is 5%. Interest will be paid on April 1 and October 1 of each year. Assuming that all of the bonds are sold on the issue date, the first interest payment will total $12500. (Round to the nearest whole dollar. Do not input a comma.) X Sorry, your answer is incorrect. Read about this You wrote X 625 instead of 12500. Challenge OK