angularjs ng-repeat ng-model

Question

<div ng-repeat="item in carlist">
    <div ng-if="item.feeType=='01'" class="col-md-4">
        <label>{{item.feeName}}:</label> <span>{{item.fees}}</span> <input  type="checkbox" ng-true-value="{{item.fees}}" ng-false-value='0'  ng-model="item.fees"/>
    </div>
    <div ng-if="item.feeType=='02'" class="col-md-4" ng-init="aa(item.fees)">
        <label>{{item.feeName}}:</label>
        <select name="" id="" ng-model="item.fees"  ng-init="item.fees=dateArry[0]" ng-options="x for x in dateArry">
        </select>
    </div>
    <div ng-if="item.feeType=='03'" class="col-md-4">
        <label>{{item.feeName}}:</label>
        <input type="text" ng-model="item.fees" />
    </div>
</div>
<button ng-click="sum()">总计</button>
js代码
 app.controller('Controller', function ($scope) {
        $scope.a1="sad";
         $scope.carlist=[{"id":"01","feeName":"小费a","fees":"100","feeType":"01"},
             {"id":"02","feeName":"小费b","fees":"100,200,300","feeType":"02"},
             {"id":"03","feeName":"小费c","fees":"160","feeType":"03"}
         ];
        $scope.aa=function(data){
            $scope.dateArry=data.split(",");
            console.log($scope.dateArry);
        };
        $scope.sum=function(){
       
        }我想计算出这三项费用的总和，为checkbox当打钩选上时候就按照100价格计算 没勾上就是按0计算
下拉框这些都可以选择  ，输入框也可以输入值，我不知道$scope.sum函数怎样写，那三个ng-model也不知道怎样写
有木有大神指导下额。。

Answer 1

<div ng-repeat="item in carlist">
    <div ng-if="item.feeType=='01'" class="col-md-4">
        <label>{{item.feeName}}:</label> <span>{{item.fees}}</span> <input  type="checkbox" ng-true-value="{{item.fees}}" ng-false-value='0'  ng-model="item.fees"/>
    </div>
    <div ng-if="item.feeType=='02'" class="col-md-4" ng-init="aa(item.fees)">
        <label>{{item.feeName}}:</label>
        <select name="" id="" ng-model="item.fees"  ng-init="item.fees=dateArry[0]" ng-options="x for x in dateArry">
        </select>
    </div>
    <div ng-if="item.feeType=='03'" class="col-md-4">
        <label>{{item.feeName}}:</label>
        <input type="text" ng-model="item.fees" />
    </div>
</div>
<button ng-click="sum()">总计</button> app.controller('Controller', function ($scope) {
        $scope.a1="sad";
         $scope.carlist=[{"id":"01","feeName":"小费a","fees":"100","feeType":"01"，“'ischecked'”:false},
             {"id":"02","feeName":"小费b","fees":"100,200,300","feeType":"02",“'ischecked'”:false},
             {"id":"03","feeName":"小费c","fees":"160","feeType":"03",“'ischecked'”:false}
         ];
        $scope.aa=function(data){
            $scope.dateArry=data.split(",");
            console.log($scope.dateArry);
        };
        $scope.sum=function(){
         for(let fee of $scope.carlist){           }
        }

Answer 2

$scope.sum=function(){
       let sum = 0;
       for(let fee of $scope.carlist){
           switch (feeType.type){
                case '01':
                     sum += fee.fees ? fee.fees:0;
                     break;
                case '02':
                case '03':
                     sum += fee.fees；
                     break;               
           }
       }
}