On January 1, 2020, Bridgeport Corporation issued $4,080,000 of 10-year, 8% convertible debentures at 102. Interest is to be paid semiannually on June 30 and December 31. Each $1,000 debenture can be converted into 8 shares of Bridgeport Corporation $101 par value common stock after December 31, 2021.

On January 1, 2022, $408,000 of debentures are converted into common stock, which is then selling at $111. An additional $408,000 of debentures are converted on March 31, 2022. The market price of the common stock is then $115. Accrued interest at March 31 will be paid on the next interest date.

Bond premium is amortized on a straight-line basis.

Make the necessary journal entries for:

(a) December 31, 2021. (c) March 31, 2022. (b) January 1, 2022. (d) June 30, 2022.