public function budget_amount()
 {
     $objective_amount = Input::get('objective_amount');
     $budget_amount = Input::get('budget_amount');
     $conversion_rate = Input::get('conversion_rate');
     $paid_percentage = Input::get('paid_income');
     $addword_percentage = Input::get('addword_percentage');
     $average_order = Input::get('average_order');
     $budget_percentage = Calculation::marketing_percentage($objective_amount, $budget_amount);
     $budget_cpc = Calculation::budget_per_visitor($objective_amount, $budget_percentage, $conversion_rate, $paid_percentage, $addword_percentage, $average_order);
     $return = array("budget_cpc" => $budget_cpc, "budget_percentage" => $budget_percentage);
     echo json_encode($return);
 }