Other comprehensive income

BPP Mock 3 Revision Kit F7 has the following question:
Financial assets

Shareholding A – a long-term investment in 10,000 of the equity shares of another company. These shares were acquired on 1 October 20X2 at a cost of $3·50 each. Transaction costs of 1% of the purchase price were incurred. On 30 September 20X3 the fair value of these shares is $4·50 each.
Shareholding B – a short-term speculative investment in 2,000 of the equity shares of another company.These shares were acquired on 1 December 20X2 at a cost of $2·50 each. Transaction costs of 1% of the purchase price were incurred. On 30 September 20X3 the fair value of these shares is $3·00 each.
Where possible, Speculate Co makes an irrevocable election for the fair value movements on financial assets to be reported in other comprehensive income.

In respect of the financial assets of Speculate Co, what amount will be included in other comprehensive income for the year ended 30 September 20X3?
A $9,650
B $10,650
C $10,000
D $nil

The answer given is:
A
Shareholding A is not held for trading as an election made – FVTOCI.
Shareholding B is held for trading and so FVTPL (transaction costs are not included in carrying
amount).
Cost of shareholding A is 10,000 × $3.50 × 1.01 = $35,350.
FV at 30 September 20X3 10,000 × $4.50 = $45,000.
Gain = 45,000 – 35,350 = $9,650.

I think the answer should be 10,000*(4.5-3.5)= 10,000 as it’s measured through FVTOCI, according to textbook BPP F7 page 198

Please help me to explain more about this!
Thank you!