Retained Earnings = $86,000
Accounting Equation…Assets= Liabilities + Owners Equity
Assets (Cash, acct rec, equipment, building, land) = $421,000
Liabilities (Notes payable, accounts payable)= $260,000
Equity (capital stock) = $75,000
Liabilities + Equity= $335,000
Retained Earnings flows into equity
$421,000-$335,000= $86,000
$335,000+86,000= $421,000
So the equation balances.