CGU Question(Similar scenario to lecture video, but contradicts with BPP answer)

A cash generating unit comprises the following assets: $ 000 Building 700 Plant and equipment 200 Goodwill 90 Current assets 20 ____ 1010 One of the machine carried at $40000 is damaged and will have to be scrapped. The recoverable amount of the cash generating unit is estimated at $ 750000. What will be the carrying amount of the building when the impairement loss has been recognized? A)$597000 B)$577000 C)$594000 D)$548000 In your lecture video, I understand your reasoning for not further impairing P+E after removing the destroyed P+E. But in this question, BPP also includes the remaining P+E in the pro-rata impairment calculation along with Building, giving answer C. While following your method I got $570000. Can you please assist? Not sure if I may have gotten confused somewhere along. Thanks