On September $8,$ a company provides services on account to a customer for $$2,400,$ terms $4/10,$ n$/30.$ The customer pays for those services on September $15.$

Record the transactions for the company when the services are provided on September $8$ and when the cash is collected on September $15.($If no entry is required for a particular transaction$/$event$,$ select $"$No Journal Entry Required" in the first account field.$)$