A company sells windows to a customer for a price of $$2400$ which includes the installation of the windows. The fair value of the installation alone is $$500$ and the fair value of the Windows alone is $$2000.$ The windows were delivered on September $1,2020$ and the installation occurred on September $15,2020.$ What revenue is recorded on September $1?$

a$.$ $$440$

b$.$ $$1,920$

c$.$ $$2,000$

d$.$ $$2,400$

Under the earnings approach, revenue from selling products is generally recognized

a$.$ after costs are recovered.

b$.$ as cash is collected.

c$.$ when the goods are delivered to the customer

d$.$ on a percentage of completion.