Find the gross margin as a percentage amount. Gross Sales $290,000 Customer Returns and Allowances $15,250 Opening inventory at cost $42,000 Billed cost of goods $103,000 Inward transportation $5,000 Cash Discount $7,100 Closing inventory at cost $37,500 Payroll $51,000 Occupancy $28,000 Wrapping and packing $1,400 Utilities $4,000 Delivery $2,880 Your