ANSWER 4
Under IFRS 15, a contract modification that results in a price reduction for additional distinct goods or services, due to a reason such as poor service, is not treated as a separate contract. Rather, it is seen as a modification of the original contract.
In this scenario, the reduction in price for the additional 50 units to $65 per unit is a modification of the terms of the original contract. The vendor needs to adjust the transaction price for the original contract to reflect this change. This adjusted price will then be allocated to the remaining performance obligations in the contract.
Here is how it looks in a table:
Please note: