hello sir

this is the accounting standard application question please solve it correctly.

4. XYZ Corporation sells household appliances. Customer B buys a coffee machine on credit and promises to pay three months after the date of purchase. A month later, XYZ Corporation learns that the Customer B has lost his job and has not found a new one yet. Discuss whether or not this transaction is considered as a "sale" according to the IFRS 15 Revenue from Contracts with Customers Standard. (25 points)