Determine the true cash balance as of May 31.

Nickleson Company had an unadjusted cash balance of $7,810 as of May 31. The company's bank statement, also dated May 31, included a $50 NSF check written by one of Nickleson's customers. There were $1,491 in outstanding checks and $220 in deposits in transit as of May 31. According to the bank statement, service charges were $40, and the bank collected an $1,100 note receivable for Nickleson. The bank statement also showed $21 of interest revenue earned by Nickleson. Required: Determine the true cash balance as of May 31. (Hint:it is not necessary to use all of the preceding items to determine the true balance)