Adjusting entry for Rent Receivable:
It is given that Sanborn Company rents space to a tenant for $3,100 per month. The tenant currently owes rent for November and December, it means the Rent Receivable as on Dec. 31 is (3100*2) = $6,200
So the adjusting entry as on Dec. 31 shall be as follows:
Rent Receivable Debit $6,200
Rent Revenue Credit $6,200
(Being adjustment made for rent receivable)