On January 1, 2016, when its $30 par value common stock was selling for $80 per share, Bramble Corp. issued $11,700,000 of 8% convertible debentures due in 20 years. The conversion option allowed the holder of each $1,000 bond to convert the bond into five shares of the corporations common stock. The debentures were issued for $12,636,000. The present value of the bond payments at the time of issuance was $9,945,000, and the corporation believes the difference between the present value and the amount paid is attributable to the conversion feature. On January 1, 2017, the corporations $30 par value common stock was split 2 for 1, and the conversion rate for the bonds was adjusted accordingly. On January 1, 2018, when the corporations $15 par value common stock was selling for $135 per share, holders of 30% of the convertible debentures exercised their conversion options. The corporation uses the straight-line method for amortizing any bond discounts or premiums. Prepare the entry to record the exercise of the conversion option, using the book value method.