It's nice to see you again, @Patsypat20!

Assigning a foreign currency account to adjustment is unavailable because QuickBooks will create the adjustment base on your default exchange rate and home currency.

Also, you don't need to create a bill for the Showroom if you pay them instantly. Instead, writing a check is proof that you have created an expense for them.

I'm adding these helpful articles for more ideas in recording your expenses: Income and Expenses.

Let us know in the comments if you need more help. Thanks!