For each of the following independent items, indicate when revenue should be recognized.

a. Interest on loans made by a financial institution, receivable in three years when the customer, who has an excellent credit rating, will make payment.

b. Recognition of revenue from the cash sale of airline tickets, when the travel purchased will occur in the next fiscal period.

c. Transportation of freight by a trucking company for a customer; the customer is expected to make payment in accordance with the terms of the invoice in 60 days. The customer has a good financial position.

d. Building houses in a subdivision, when the project will take two years to complete and the contractor is building the houses under a contract from the local government. The local government owns the land and the homes as they are constructed.