6. The Cash account of Safe and Secure Security Systems reported a balance of $2,490 at May 31, 2011. There were outstanding checks totaling $500 and a May 31 deposit in transit of $300. The bank statement, which came from Tri Cities Bank, listed the May 31 balance of $3,360. Included in the bank balance was a collection of $680 on account from Ryan Saar, a Safe and Secure customer who pays the bank directly. The bank statement also shows a $20 service charge and $10 of interest revenue that Safe and Secure earned on its bank balance.