请把以下信函翻译为中文。 Dear Michelle, Please find enclosed our most improved rates ex-Shanghai. The rates as advised are our net cost subject to profit share. Please quote customer and advise selling rate by return. Denver, Cosco Rate: USD 85/cbm Sailing frequency: weekly T/T: 18 days a – THC/CFS: USD 10/cbm b – Customs clearance: USD 40 per shipment Regards Johnson Smith