I want to use like  this formula....Monthly_Common_Bill__c = (Room_cost__c + Net_Bill__c + power_bill__c) / Number_of_peoples__c
where i can put this formula.Actually I Tried This formula
1.at custom field(Monthly_Common_Bill__c), in select formula, select currency as the return type, then in the formula area enter above formula:
2.tried at Validation rule also.
this above twotypes its not working.please give me ur valuable answer.Thanks in Advance....

I am recently started learning Lightning.....I am Trying to practice my first code...lightning component and lightning application.in lightning application I am getting below type of exception.why its happened,how to resolve it.(I created my own domain also).preview also not showing any code.

How To create a Login page in Visualforce?how to create login and register new id's?how to save those register id's and passwords?

When I click REGISTER Button, it needs to redirect to another Visualforce page, in that page i need to have fields such as: FirstName, LastName, Email Id,  Password and Confirm Password.

when I click Login:if match login id and password corret login to new page.otherwise display login id or password error.

<apex:page standardController="Actress__c" recordSetVar="actress" sidebar="false" >
 <apex:form >
  <apex:pageBlock title="Display Total Records">
  
  <apex:inlineEditSupport >
   <apex:pageBlockTable var="Actress__c" value="{!actress}" columns="8">
    
     <apex:column value="{!Actress__c.Name}"/>
     <apex:column value="{!Actress__c.cost__c}"/>
    
    </apex:pageBlockTable>
   </apex:inlineEditSupport>
  <apex:pageBlockButtons >
  <apex:commandButton Value="SAVE EDITED" action="{!quicksave}"/>
  </apex:pageBlockButtons>
  </apex:pageBlock>
  
 </apex:form>
</apex:page>

I want to use like  this formula....Monthly_Common_Bill__c = (Room_cost__c + Net_Bill__c + power_bill__c) / Number_of_peoples__c
where i can put this formula.Actually I Tried This formula
1.at custom field(Monthly_Common_Bill__c), in select formula, select currency as the return type, then in the formula area enter above formula:
2.tried at Validation rule also.
this above twotypes its not working.please give me ur valuable answer.Thanks in Advance....

I am recently started learning Lightning.....I am Trying to practice my first code...lightning component and lightning application.in lightning application I am getting below type of exception.why its happened,how to resolve it.(I created my own domain also).preview also not showing any code.