Sale and repurchase agreements

Qn) Mango sold an item of maturing inventory to a bank on 1 january 20X3 for $500 000. At this date the inventory which had cost $200 000 to produce but had a fair value of $900 000, which was expected to increase over the next 3 years.At the end of 3 years, Mango have the option to repurchase the inventory at $665 000 giving an effective interest rate of 10%. What items should be recorded in the SOPL for the year ended 31 december 20x3? For the qn above, i already got the correct answer of : Finance cost $50 000 My question is, if they ask us what is the finance cost for 31 december 20X4 is the answer still $50 000 or will it be 550 000 X 10% = 55000 ?