Best way to remove a row off an object based off a certain condition?

Down below I made a function to remove any row where the difference of the amount within latest row and any other row is greater than 300.

bank_data = [{"arrival_time":"12:00","amount":"900","id":"BS"},  
{"arrival_time" :"12:00","amount":"300","id":"BD"},
{"arrival_time" :"01:00","amount":"400","id":"SW"},
{"arrival_time" :"03:00","amount":"800","id":"OS"},
{"arrival_time" :"03:00","amount":"500","id":"SF"},
{"arrival_time" :"04:00","amount":"600","id":"SJ"},
{"arrival_time" :"04:00","amount":"600","id":"FS"},
{"arrival_time" :"06:00","amount":"900","id":"JC"}];

function update_list(obj){
    if(obj.length > 0) {
        latest = obj.length -1; 
        for(var i = 0; i < obj.length; i++){
            if((obj[latest].amount - obj[i].amount) > 300){
                obj.splice(i, 1);//remove the ith row of the object
            }
        }
    }
    return obj;
}

Goal Result

bank_data = [{"arrival_time":"12:00","amount":"900","id":"BA"},  
{"arrival_time" :"03:00","amount":"800","id":"OS"},
{"arrival_time" :"04:00","amount":"600","id":"SJ"},
{"arrival_time" :"04:00","amount":"600","id":"FS"},
{"arrival_time" :"06:00","amount":"900","id":"JC"}];