Adding values of multiple documents. Javascript and MongoDB

Hi. I am running a query on my mongodb using the driver and writing the code in javascript. I am quite new to this.
So my question is , after i run the query i get the results for each individual document with the field i am querrying. How can i combine all of those results to give me one number. I am posting my results below.

As you can see above i get three results , one for each document. How can I add those field values together. Dont know if it is a javascript or mongo technique.

Thank you

You should take a look at https://docs.mongodb.com/manual/aggregation/. The $match and $group stages would be a good starting point.

MongoDB university offers a an aggregation framework specific course (M121). You may find more information at https://university.mongodb.com/.

But you can do it in JavaScript also using any JavaScript arithmetic operators.

Noi understand how to run the aggregation inmongo and a query in JS. My question is how do i add all the individual values from a certain field in al the different documents together.