Answer:
The maximum price Division North will pay for Product Y is $12.
Step-by-step explanation:
With the information given, the transfer price will be fall between the price Division South can sell outside and the price the Division North can buy outside or between $10 to $12.
Besides, when buying at $12, Division North can still enjoy the margin of $1 per one Product ZZ sold; as cost of good sold = Cost of Product Y + Cost of further production = 12 + 12 = $24 while cost of Product ZZ =25.
So, the maximum price Division North will pay for Product Y is $12.