Astill Industries issued $1 million in 8%, 10-year bonds on Jan 1, 2019, when the market rate for similar bonds was 10%. The bonds pay interest semi-annually on July 1, and Dec 31. At 12/31/2021, when the market rate for similar bonds is 6%, AI considers whether to retire the bonds and reissue them at 6%. The early retirement of the bonds would result in an economic gain of $[amount].

Group of answer choices 

1. $112,961. 
2. $(112,961). 
3. $242.161. 
4. $0.