July 9th Office Supply Corp delivers furniture ($1,060) and expendable office supplies ($160) to Random
Leaving an invoice for $1220.

The journal entry to record the July 9th transaction will include a credit of $1,220 to what account??

I’m pretty sure that it’s Accounts Payable.
But I'm not to sure...

The question is who are you making the JE for? From the sounds of it, you are the company that delivered the goods, NOT received them.

Therefore, you would:
Dr. AR
Cr. Sales

If you are Random (the company who received the goods), you would credit AP, but I do not believe that is the case here.

Dr. Furniture 1060
dr. supplies 160
Cr. Accounts payable

July 9th Office Supply Corp delivers furniture ($1,060) and expendable office supplies ($160) to Random
Leaving an invoice for $1220.

The journal entry to record the July 9th transaction will include a credit of $1,220 to what account????

I’m pretty sure that it’s Accounts Payable.
But i'm not to sure....
Accounts payable is correct