The following trial balance was taken from the books of Fisk Corporation on December $31,2020.$

$\backslash$table$[[$Account$,$Debit,Credit$],[$Cash$,$$$9,000,],[$Accounts Receivable,$40,000,],[$Notes Receivable,$10,000,],[\backslash$table$[[$Allowance for Doubtful$],[$Accounts$]],,$$$1,800$