Anorderisarequesttosupplyaspecifiedquantityofgoods,whichmayresultfrom________or_________withsubsequentquotations.
Whenthesellerreceivesthebuyer’scounter-offer,andhefindssometermsandconditionsunacceptabletohim,hewillstatehisownopinionsinaletter,whichiscalledas_____。