ring $20212021,$ GibsonGibson $$Network$,$ Inc., which designs network$$ servers, earned revenues of $ $780$$$780$ million. Expenses totaled $ $510$ million.$$510$ million. GibsonGibson collected all but $ $21$$$21$ million of the revenues and paid $ $560$$$560$ million on its expenses. Read the requirements LOADING... $.$ Question content area bottom Part $1$ Requirement a$.$ Under accrual$$ accounting, what amount of revenue should GibsonGibson report for $20212021?$ How does the revenue principle help to answer this$$ question?