On March 12, Medical Waste Services provides services on account to Grace Hospital for $9,600, terms 4/10, n/30. Grace does not pay for services until March 31, missing the 4% sales discount. Required: For Medical Waste Services, record the service on account on March 12 and the collection of cash on March 31. (If no entry is required for a particular transaction/event, select "No Journal Entry Required" in the first account field.).