Explanation:

The correct calculation for ending interest payable is derived as follows:

$$\text{Ending Interest Payable} = \text{Beginning Interest Payable} + \text{Interest Expense} - \text{Cash Interest Paid}$$

Substituting the given values:

$$\text{Ending Interest Payable} = €45,000 + €50,000 - €15,000 = €80,000$$

• Option A is incorrect because it does not account for the interest expense.
• Option C is incorrect because it fails to deduct the cash interest paid.

This question tests the linkage between the balance sheet (interest payable) and the cash flow statement (cash interest paid).