The following amounts appeared in the adjusted trial balance of Laurier Inc. for the year Sales revenue credit balance of $ 88000 Deferred revenue credit balance of $ 19000 - Sales discounts - debit balance of $ 8000 Cost of Sales - debit balance of $ 38000 Sales returns and allowances - debit balance of $ 1000 Interest expense debit balance of $ 7600 Calculate gross profit/margin for the year.