JIRA Calculated number field formula help

[NT]

I have one text custom_field NAME and one calculated number field RATE.

I want to displayed value in rate field based on the Name selected.

For example:  if Name is John then RATE will be 50.00.

I tried below formulas  but none of them worked..

1.-------

<!-- @@Formula:
Object cf1 = issue.get("customfield_1");
Object cf7 = issue.get("customfield_7");
double number = ((cf1 != null ? Integer.parseInt(cf1.toString()) : 1 )) +0;
if(cf7 != null && !cf7.toString().equals( "john" ) ){
double number= ((cf1 != null ? Integer.parseInt(cf1.toString()) : 1 ) +50;
}
return number;
-->

2.----------

<!-- @@Formula:
String i = issue.get("customfield_1");
if (i.equals("john")) return 50;
if (i.equals("Nick")) return 70;
return "high";
-->

None of above worked ... Please help!!!