Required information The following information applies to the questions displayed below.] Fraud Investigators Inc. operates a fraud detection service. a. On March 31, 10 customers were billed for detection services totaling $18,000. b. On October 31, a customer balance of $1,150 from a prior year was determined to be uncollectible and was written off d. On December 31, $430 of bad debts were estimated and recorded for the year. Required 1. Prepare journal entries for each transaction above. (If no entry is required for a transaction/event, select "No Journal Entry Required" in the first account field.)