My question involves business law in the state of: Washington

1.) My Single-Member LLC receives income in the form of checks from other businesses.
2.) These checks are all made out to my LLC.
3.) Every week, I deposit a stack of these checks into my LLC Business Account via the ATM.

Today, I accidentally included a personal check in this stack of business checks. The personal check was for $80.00, and was a refund from my doctor (the doctor visit was cheaper than anticipated). I had meant to deposit this $80.00 check into my Personal Account, but I got distracted and accidentally stuck it in the pile of LLC checks. (Unfortunately, the bank manager was not able to open the ATM deposit vault to "retrieve the check" to give it back to me.)

Question: To maintain the integrity of my LLC, to avoid appearance of commingling, what should I do to fix this?