4. The quantity discount schedule of a china importer is 0.5% discount on orders for $1,000, 1% discount on orders for $1,500, 1.5% discount on orders for $2,500, and 2% discount on orders for $3,000. A retail- er's order of bone china luncheon sets amounted to $2,800. No other discounts were allowed on this particular group. How much should the retailer pay the importer