How do I account for $93 spent in cash for packaging, which was included in various invoices. I assume it will require a journal entry.

You do NOT need a journal entry in most cases — QBO has simpler tools. 

Record a Cash Expense (Best Practice)

Use this if the money came from:

• Petty cash

• A business cash box

• Personal funds (and you want to reimburse yourself later or record as owner contribution) 

  You said it’s already included in invoices — so you’ve already collected the income, and don’t need to invoice separately for packaging. That’s fine. Just be sure:

  • The packaging cost is not entered as a line item in a way that makes it look like extra income

  • You’re not double-booking income and expense