js: Sum Test

SumTest.js

const isThereAMaxMatch = (list) => {
    let thereIsASum = false;
    let sortedList = list.sort((a, b) => { return b - a }); // hi to low
    const maxNumber = sortedList[0];

    let numCheck = (list) => {

        let accumulatedSum = list[0];

        for (i = 1; i < list.length; i++) {

            if (accumulatedSum < maxNumber) {
                let tempSum = accumulatedSum + list[i];

                if (tempSum == maxNumber) {
                    thereIsASum = true;
                    console.log(`We have a match`);
                    return thereIsASum; // spits out that we have a match and returns true
                } 
                if (tempSum < maxNumber) { accumulatedSum = tempSum } //add the increment
            }
        }
    };

    for (i = 0; i < sortedList.length; i++) {
        sortedList.shift(); 
        let test = numCheck(sortedList);
        if (test) { break; }
    }

    if (!thereIsASum) {
        console.log(' we did not find a sum ')
    }

};

//a test 
isThereAMaxMatch([1, 2, 4, 5, 7, 8, 20]);