Intragroup Sales

Hi,

I have come across two questions that in my dyslexic brain reads exactly the same, however, the answers are different and I am struggling to understand why. Would you be able to help, please?

1) Catfish has owned 75% of Shark for a number of years. During the year to 31 December x8 Shark sold goods to Catfish for $75,000. Castfish resold 40% of these goods by the year end. Shark applies a 25% mark-up on all sales.

By what amount should the consolidated retained earnings of Catfish at 31 December x8 be reduced in respect of these intragroup sales?

Answer:

There is 60% left in stock soooo…. $75,000 x 60% /125 x 25 x 75% = $6,750

2) Frog acquired 80% of Tadpole on 1 April x7. The individual financial statements of Frog & Tadpole for the year ended 31 December x7 showed revenue of $280,000 and $190,000 respectively. In the post-acquisition period Tadpole sold goods priced at $40,000 to Frog.
50% of these goods were still held in inventory by Frog at the end of the year.

What was group revenue in the consolidated statement of P&L for the year ended 31 December x7?

Answer: $280,000 + ($190,000/12×9) – $40,000 = £382,500

This is where I am completely baffled.

In Question 2) 50% of inventory has been sold, therefore 50% is remaining…
So why isn’t the answer $280,000 + ($190,000/12×9) – ($40,000 x 50%) = $402,500.

What am I missing?

Thanks