invoiceAndMemocalculateDueDate Method

[SoapHeaderAttribute("mySLHeader", Direction = SoapHeaderDirection.In)]
[WebMethodAttribute(MessageName = "calculateDueDate", Description = "Calculates a Due Date for Customer or TermsID")]
[ScriptMethodAttribute(UseHttpGet = false, ResponseFormat = ResponseFormat.Json)]
public DateTime calculateDueDate(
	string custID,
	string termsID,
	DateTime docDate
)