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On 1 July 20X5 XYZ Ltd purchased a debenture with the following conditions: Face value on redemption = $3612086 Maturity periods: 5 years Coupon rate = 4% (payable on 30 June each year) Effective interest rate = 6% XYZ Ltd classifies the debenture as a debt instrument and uses the amortised cost method. The increase in the balance of the debenture at the end of the first year is