Sales_amount_without_tax__c
    false
    Case( Currency__c,"RMB", Sales_Amount__c / Opportunity__r.Tax_Intra_F_Copy__c 
,"USD",IF(Order_date__c>=Datevalue($Label.Tax_Foreign_Date),Sales_Amount__c * 6.8,
 IF(Order_date__c>=Datevalue("2018-05-01"),Sales_Amount__c * 6.3, 
 IF(Order_date__c>=Datevalue("2016-12-01"),Sales_Amount__c * 6.8, 
 IF(Order_date__c>=Datevalue("2016-07-01"),Sales_Amount__c * 6.5, 
 IF(Order_date__c>=Datevalue("2012-10-01"), 
 Sales_Amount__c * 6.3, Sales_Amount__c * 6.6 
 ) 
 ) 
 )
 ) 
 )
,0 
)
    BlankAsZero
    
    18
    false
    2
    false
    Number
    false