Sellall Department Stores reported the following amounts as of its December 31 year-end: Administrative Expenses, $2,900 : Cost of Goods Sold, \$28,800; Income Tax Expense, \$3,500; Interest Expense, \$2,100; Interest Revenue, \$250; General Expenses, \$3,100; Net Sales, $45,000; and Delivery (freight-out) Expense, $350. Required: 1. Calculate the gross profit percentage