vue render vm

vue.render.vm.js

                            model: {
                                value: (me.skus.dataSource[index].minUnitPrice),
                                callback: function($$v) {
                                    me.$set(me.skus.dataSource[index], "minUnitPrice", $$v);
                                    if(me.unitsMultiple 
                                        && me.cartonUnits.dataSource[1].quantity){
                                        var prices = ($$v * me.cartonUnits.dataSource[1].quantity);
                                        me.$set(me.skus.dataSource[index], "wholesalePrice", prices);
                                    }

                                },
                                expression: "skus.dataSource["+ index +"].minUnitPrice"
                            },