FR December 2016 CBE – Sec A , Q11

On 1 October 20X8, Picture Co acquired 60% shares in Frame Co. At 1 April 20X8, the credit balances on the revaluation surpluses relating to Picture Co and Frame Co’s equity financial asset investments stood at $6,400 and $4,400 respectively.

The following extract was taken from the financial statements for the year ended 31 March 20X9:

Other comprehensive income: loss on fair value of equity financial asset investments Picture Co ($)- (1,400) Frame Co ($)-(800)
Assume the losses accrued evenly throughout the year.

What is the amount of the revaluation surplus in the consolidated statement of financial position of Picture Co as at 31 March 20X9?

This question is from December 2016 CBE – Sec A , Q11
The answer provided for question is $ 4760 [ $6,400-$1,400 loss – (800 loss x 60% x 6/12) = $4,760 ].

Why they are not adding $4400 of Frame Cos revaluation surplus ?
Please explain me this.