function solve(stock = [], ordered = []){

    function addingToArr(inStock = []){

        let inStockOutput = [];

        for(let i = 0; i < inStock.length; i++){

            if(i % 2 == 0){
                let name = inStock[i];
                let count = Number(inStock[i + 1]);

                let product = { name, count };
                inStockOutput.push(product);
            }
        }
        return inStockOutput;
    }

    let firstArray = addingToArr(stock);
    let secondArray = addingToArr(ordered);

    let finalResult = firstArray.slice();

    for (const first of firstArray) {
        for (const second of secondArray) {
            if(first.name === second.name){
                first.count += second.count;
            }
            else{
                finalResult.push(second)
            }
        }
    }

    console.log(finalResult)
}

solve([
    'Chips', '5', 'CocaCola', '9', 'Bananas', '14', 'Pasta', '4', 'Beer', '2'],
    [
    'Flour', '44', 'Oil', '12', 'Pasta', '7', 'Tomatoes', '70', 'Bananas', '30'])