<?xml version="1.0"?><methodCall><methodName>InvoiceService.addOrderItem</methodName><params><param><value><string>key</string></value></param><param><value><int>5</int></value></param><param><value><int>4</int></value></param><param><value><int>4</int></value></param><param><value><double>120</double></value></param><param><value><int>1</int></value></param><param><value><string>TestBlankOrderWithDiscount</string></value></param><param><value><string/></value></param></params></methodCall>