public with sharing class costsheet {
 
 public costsheet(ApexPages.StandardController controller) {

    }

 public List<Order> ordwrap = new List<Order>();
 public List<Opportunity> oppwrap = new List<Opportunity>();
 
 
 
 public costsheet()
 {
  this.SOWrappers = new List<SOWrapper>();
  ordwrap=[Select id,Cost_Price_As_per_Allocation__r.CI__c from Order];
  oppwrap=[select Id,name,Account.Name from opportunity];
  for(opportunity opp:oppwrap){
                for(Order ord: ordwrap){
                    If(opp.id == ord.id)
                    {
                        SOWrapper wrapper = new SOWrapper(ord ,opp ,opp.Cost_Price_As_per_Allocation__r );
                        this.SOWrappers.add(wrapper);
                    }
                        
                    }
                }
 }
 public List<SOWrapper> SOWrappers{get;set;}
 public class SOWrapper{
        public Order order{get;set;}
        public Opportunity opportunity{get;set;}
        public Cost_Price__c costprice{get;set;}
        
        public SOWrapper(Order ord, Opportunity opp,Cost_Price__c cp){
            order= ord;
            opportunity = opp;
            costprice = cp;
        }
    }
    
}