If a customer has the option to purchase a warranty separately (for example, because the warranty is priced or negotiated separately), the warranty is a distinct service because the entity promises to provide the service to the customer in addition to the product that has the functionality described in the contract. In those circumstances, an entity shall account for the promised warranty as a performance obligation in accordance with paragraphs 22-30 and allocate a portion of the transaction price to that performance obligation in accordance with paragraphs 73-86