Typo in BPP page 124 ACCA F3 BPP practice & revision kit

Question 26.25: X co acquired 80% of the equity share capital in Y.co on 31.7.20X6. Extracts from the two companies’s statements of profit and loss for the year ended 30.9.20X6 were as follows:
– – – Xco($’000) Y co ($’000)

Revenue 3,400 2,400
Cost of sales 1,500 1,800
During the year ended 30.9.20X6, Y co sold goods for $5000 each month to X co, at a mark up of 25%. At the end of the year X co had 50% of these goods left in inventories.
What is the group gross profit for the year ended on 30.09.20X6?

The answer for the question in book is $ 2,001,000, but I think it should be $1,999,999, may be due to that fact that unrealised profit ($1000) should be deducted to $2,000,000, but not added to $2,000,000 to arrive at the answer!
Please verify me for this typo
Thankyou!