var obj = JSON.parse("total(PC+CH)":"50", "Name":"Doe"}');

document.getElementById("demo").innerHTML = obj.total(PC+CH);

Here is the json which has some special characters like + and (). But unable to access the element value using total(PC+CH) since it has some special characters.

How can we get the value of total(PC+CH)?

NOTE: I dont want to use indexing, i want to use total(PC+CH) and get the value