Nanotech Innovations Co. sells orthopedic supplies to hospitals. Journalize the entries to record the following selected transactions of Nanotech Innovations Co.:
a. Purchased for cash $600,000 of Sanhueza Co. 7% bonds at 102 plus accrued interest of $10,500.
b. Received first semiannual interest.
c. At the end of the first year, amortized $960 of the bond premium.
d. Sold the bonds at 98 plus accrued interest of $3,500. The bonds were carried at $606,720 at the time of the sale.