please explain why we get 120-3=117?

-t-section: Name: 10 000 Exercise 1. Sunland Company issued $6,120,000 of 10%, ten-year convertible bonds on July 1 96.1 plus accrued interest. The bonds were dated April 1, Year 7 with interest payable April 1 and October 1. Bond discount is amortized semiannually on a straight-line basis. On April 1, Year 8, $1,224,000 of these bonds were converted into 500 shares of $20 par value common stock. Accrued interest was paid in cash at the time of conversion. 5 69 936 , Year 224000 hom bond contertc/> If "interest payable" were credited when the bonds were issued, what should be the amount of the debit to "interest expense" on October 1, Year 7? What should be the carrying value of the bonds on April 1, Year 8? Prepare the journal entry for the conversion on Apr. 1, Year 8. remainung manths to 120-3=117 months ntuet amorhd ragh manth Exercise 2 On December 1, Year 8, Sheridan Company issued at(102) 640 of its 8%, $1,000 bonds. Attached to each bond was one detachable stock warrant entitling the holder to purchase 10