How to find sum of values in a recycler view

I have a list containing some prices in a recycler view. I would like to find the total prices. How would I do it?
below is my list

Below is the function that I have but it is not working for me

 public void total(View view){
int total_goods=0;
for (int i=0;i<modelArrayList.size();i++){
total_goods +=modelArrayList.get(i).getTotal_price();
}
}

Below is my code from the receiving of the data

public void setCheckout_button(View view){
Scanner scanner = new Scanner();
scanner.ScanCode(CheckOutActivity.this);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
//    super.onActivityResult(requestCode, resultCode, data);
final IntentResult result = IntentIntegrator.parseActivityResult(requestCode,resultCode,data);
if (result !=null){
if (result.getContents() !=null){
addItemOptions.setVisibility(View.VISIBLE);
code_input_checkout.setText(result.getContents());
}
else {
Toast.makeText(this, "No results", Toast.LENGTH_LONG).show();
}
}
else {
super.onActivityResult(requestCode, resultCode, data);
}
}
public void AddStock(View view){
String code = String.valueOf(code_input_checkout.getText());
String item = String.valueOf(name_input_checkout.getText());
String quantity = String.valueOf(quantity_input_checkout.getText());
String unit_Price = String.valueOf(unitprice_input_checkout.getText());
String total = String.valueOf(totalprice_input_checkout.getText());
RecyclerModel model = new RecyclerModel(code,item,quantity,unit_Price,total);
modelArrayList.add(model);
recyclerAdapter.notifyDataSetChanged();
Toast.makeText(CheckOutActivity.this, "Data Added", Toast.LENGTH_SHORT).show();
Scanner scanner = new Scanner();
scanner.ScanCode(CheckOutActivity.this);
}
public void FinishAdding(View view){
addItemOptions.setVisibility(View.GONE);
}
public void total(View view){
int total_goods=0;
for (int i=0;i<modelArrayList.size();i++) {
total_goods = total_goods+modelArrayList.get(i);
}
}

My model class is below. The getTotal_price method also included

public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getItem() {
return item;
}
public void setItem(String item) {
this.item = item;
}
public String getQuantity() {
return quantity;
}
public void setQuantity(String quantity) {
this.quantity = quantity;
}
public String getUnit_price() {
return unit_price;
}
public void setUnit_price(String unit_price) {
this.unit_price = unit_price;
}
public String getTotal_price() {
return Integer.parseInt(total_price);
}
public void setTotal_price(String total_price) {
this.total_price = total_price;
}

}

replace your method total(); with code below:

int total_goods=0;
for (int i = 0; i < modelArrayList.size(); i++) total_goods+= modelArrayList.get(i).getTotal_price();

When did you call total() function? Before or after modelArrayList receive data?

Try

public int total(View view, ArrayList<Integer> modelArrayList){
int total_goods=0;
ArrayList<Integer> ma = modelArrayList;
for (int i=0;i<ma.size();i++){
total_goods =total_goods + ma.get(i);
}
return total_goods;
}