Exercise 21-4 Summary entries for cash received from customers [LO21-3] For each of the three independent situations below, prepare journal entries that summarize the selling and collection activities for the reporting period in order to determine the amount of cash received from customers and to explain the change in each account shown. All dollars are in millions. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field. Enter your answers in millions (i.e., 10,000,000 should be entered as 10).)