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Required information [The following information applies to the questions displayed below] Fraud Investigators Incorporated operates a fraud detection service. a. On March 31,10 customers were billed for detection services totaling $35,000. b. On October 31 , a customer balance of $2,000 from a prior year was determined to be uncollectible and was written off. c. On December 15 , a customer paid an old balance of $800, which had been written off in a prior year d. On December 31,$600 of bad debts were estimated and recorded for the year