On july 1, cooper corporation received $20,000 from smith industries in exchange for services performed. what accounting entries should cooper make to record this event, and why

It is given that on July 1, Cooper Corporation received $20,000 from Smith Industries in exchange for services performed. The accounting entries that Cooper Corporation should make to record this event is:

Cash                                               $20,000
                Service Revenue                                  $20,000

It is because Cooper Corporation received a service made by the 
Smith Industries, thus it increased the cash or debited the cash account and there is increase on its income (credit side).

Ithink its 3! hope it : -)